diff --git a/lib/node/http-upgrade-handler.js b/lib/node/http-upgrade-handler.js
index 87100fb..c58e461 100644
--- a/lib/node/http-upgrade-handler.js
+++ b/lib/node/http-upgrade-handler.js
@@ -1,9 +1,8 @@
 /* @flow */
 import type { IncomingMessage } from 'http'
-import type { Socket } from 'net'
 
 export type HttpUpgradeHandler = (
   request: IncomingMessage,
-  socket: Socket,
+  socket: net$Socket,
   head: Buffer
 ) => void | Promise<void>
diff --git a/package.json b/package.json
index 7a6be46..81e62ac 100644
--- a/package.json
+++ b/package.json
@@ -51,8 +51,8 @@
   },
   "devDependencies": {
     "ava": "^2.3.0",
-    "build-esm": "^4.2.1",
-    "flow-bin": "^0.106.2",
+    "build-esm": "^4.2.2",
+    "flow-bin": "^0.106.3",
     "flow-typed": "^2.6.1",
     "heliograph": "^4.10.5",
     "into-stream": "^5.1.0",
diff --git a/yarn.lock b/yarn.lock
index 5058785..140cc23 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -80,26 +80,6 @@
     semver "^5.4.1"
     source-map "^0.5.0"
 
-"@babel/core@^7.2.2", "@babel/core@^7.4.3":
-  version "7.4.3"
-  resolved "https://registry.yarnpkg.com/@babel/core/-/core-7.4.3.tgz#198d6d3af4567be3989550d97e068de94503074f"
-  integrity sha512-oDpASqKFlbspQfzAE7yaeTmdljSH2ADIvBlb0RwbStltTuWa0+7CCI1fYVINNv9saHPa1W7oaKeuNuKj+RQCvA==
-  dependencies:
-    "@babel/code-frame" "^7.0.0"
-    "@babel/generator" "^7.4.0"
-    "@babel/helpers" "^7.4.3"
-    "@babel/parser" "^7.4.3"
-    "@babel/template" "^7.4.0"
-    "@babel/traverse" "^7.4.3"
-    "@babel/types" "^7.4.0"
-    convert-source-map "^1.1.0"
-    debug "^4.1.0"
-    json5 "^2.1.0"
-    lodash "^4.17.11"
-    resolve "^1.3.2"
-    semver "^5.4.1"
-    source-map "^0.5.0"
-
 "@babel/generator@^7.0.0", "@babel/generator@^7.3.4", "@babel/generator@^7.4.0":
   version "7.4.0"
   resolved "https://registry.yarnpkg.com/@babel/generator/-/generator-7.4.0.tgz#c230e79589ae7a729fd4631b9ded4dc220418196"
@@ -364,7 +344,7 @@
     "@babel/traverse" "^7.1.0"
     "@babel/types" "^7.2.0"
 
-"@babel/helpers@^7.2.0", "@babel/helpers@^7.4.3":
+"@babel/helpers@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/helpers/-/helpers-7.4.3.tgz#7b1d354363494b31cb9a2417ae86af32b7853a3b"
   integrity sha512-BMh7X0oZqb36CfyhvtbSmcWc3GXocfxv3yNsAEuM0l+fAqSO22rQrUpijr3oE/10jCTrB6/0b9kzmG4VetCj8Q==
@@ -444,7 +424,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-nullish-coalescing-operator" "^7.2.0"
 
-"@babel/plugin-proposal-object-rest-spread@^7.3.4", "@babel/plugin-proposal-object-rest-spread@^7.4.3":
+"@babel/plugin-proposal-object-rest-spread@^7.3.4":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-object-rest-spread/-/plugin-proposal-object-rest-spread-7.4.3.tgz#be27cd416eceeba84141305b93c282f5de23bbb4"
   integrity sha512-xC//6DNSSHVjq8O2ge0dyYlhshsH4T7XdCVoxbi5HzLYWfsC5ooFlJjrXk8RcAT+hjHAK9UjBXdylzSoDK3t4g==
@@ -476,7 +456,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-optional-chaining" "^7.2.0"
 
-"@babel/plugin-proposal-unicode-property-regex@^7.2.0", "@babel/plugin-proposal-unicode-property-regex@^7.4.0":
+"@babel/plugin-proposal-unicode-property-regex@^7.2.0":
   version "7.4.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-proposal-unicode-property-regex/-/plugin-proposal-unicode-property-regex-7.4.0.tgz#202d91ee977d760ef83f4f416b280d568be84623"
   integrity sha512-h/KjEZ3nK9wv1P1FSNb9G079jXrNYR0Ko+7XkOx85+gM24iZbPn0rh4vCftk+5QKY7y1uByFataBTmX7irEF1w==
@@ -564,7 +544,7 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-async-to-generator@^7.3.4", "@babel/plugin-transform-async-to-generator@^7.4.0":
+"@babel/plugin-transform-async-to-generator@^7.3.4":
   version "7.4.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-async-to-generator/-/plugin-transform-async-to-generator-7.4.0.tgz#234fe3e458dce95865c0d152d256119b237834b0"
   integrity sha512-EeaFdCeUULM+GPFEsf7pFcNSxM7hYjoj5fiYbyuiXobW4JhFnjAv9OWzNwHyHcKoPNpAfeRDuW6VyaXEDUBa7g==
@@ -589,7 +569,7 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-block-scoping@^7.3.4", "@babel/plugin-transform-block-scoping@^7.4.0":
+"@babel/plugin-transform-block-scoping@^7.3.4":
   version "7.4.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-block-scoping/-/plugin-transform-block-scoping-7.4.0.tgz#164df3bb41e3deb954c4ca32ffa9fcaa56d30bcb"
   integrity sha512-AWyt3k+fBXQqt2qb9r97tn3iBwFpiv9xdAiG+Gr2HpAZpuayvbL55yWrsV3MyHvXk/4vmSiedhDRl1YI2Iy5nQ==
@@ -605,7 +585,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     lodash "^4.17.13"
 
-"@babel/plugin-transform-classes@^7.3.4", "@babel/plugin-transform-classes@^7.4.3":
+"@babel/plugin-transform-classes@^7.3.4":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-classes/-/plugin-transform-classes-7.4.3.tgz#adc7a1137ab4287a555d429cc56ecde8f40c062c"
   integrity sha512-PUaIKyFUDtG6jF5DUJOfkBdwAS/kFFV3XFk7Nn0a6vR7ZT8jYw5cGtIlat77wcnd0C6ViGqo/wyNf4ZHytF/nQ==
@@ -640,7 +620,7 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-destructuring@^7.2.0", "@babel/plugin-transform-destructuring@^7.4.3":
+"@babel/plugin-transform-destructuring@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-destructuring/-/plugin-transform-destructuring-7.4.3.tgz#1a95f5ca2bf2f91ef0648d5de38a8d472da4350f"
   integrity sha512-rVTLLZpydDFDyN4qnXdzwoVpk1oaXHIvPEOkOLyr88o7oHxVc/LyrnDx+amuBWGOwUb7D1s/uLsKBNTx08htZg==
@@ -654,7 +634,7 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-dotall-regex@^7.2.0", "@babel/plugin-transform-dotall-regex@^7.4.3":
+"@babel/plugin-transform-dotall-regex@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-dotall-regex/-/plugin-transform-dotall-regex-7.4.3.tgz#fceff1c16d00c53d32d980448606f812cd6d02bf"
   integrity sha512-9Arc2I0AGynzXRR/oPdSALv3k0rM38IMFyto7kOCwb5F9sLUt2Ykdo3V9yUPR+Bgr4kb6bVEyLkPEiBhzcTeoA==
@@ -710,7 +690,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-flow" "^7.2.0"
 
-"@babel/plugin-transform-for-of@^7.2.0", "@babel/plugin-transform-for-of@^7.4.3":
+"@babel/plugin-transform-for-of@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-for-of/-/plugin-transform-for-of-7.4.3.tgz#c36ff40d893f2b8352202a2558824f70cd75e9fe"
   integrity sha512-UselcZPwVWNSURnqcfpnxtMehrb8wjXYOimlYQPBnup/Zld426YzIhNEvuRsEWVHfESIECGrxoI6L5QqzuLH5Q==
@@ -724,7 +704,7 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-function-name@^7.2.0", "@babel/plugin-transform-function-name@^7.4.3":
+"@babel/plugin-transform-function-name@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-function-name/-/plugin-transform-function-name-7.4.3.tgz#130c27ec7fb4f0cba30e958989449e5ec8d22bbd"
   integrity sha512-uT5J/3qI/8vACBR9I1GlAuU/JqBtWdfCrynuOkrWG6nCDieZd5przB1vfP59FRHBZQ9DC2IUfqr/xKqzOD5x0A==
@@ -780,7 +760,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/helper-simple-access" "^7.1.0"
 
-"@babel/plugin-transform-modules-commonjs@^7.2.0", "@babel/plugin-transform-modules-commonjs@^7.4.3":
+"@babel/plugin-transform-modules-commonjs@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-commonjs/-/plugin-transform-modules-commonjs-7.4.3.tgz#3917f260463ac08f8896aa5bd54403f6e1fed165"
   integrity sha512-sMP4JqOTbMJMimqsSZwYWsMjppD+KRyDIUVW91pd7td0dZKAvPmhCaxhOzkzLParKwgQc7bdL9UNv+rpJB0HfA==
@@ -799,7 +779,7 @@
     "@babel/helper-simple-access" "^7.1.0"
     babel-plugin-dynamic-import-node "^2.3.0"
 
-"@babel/plugin-transform-modules-systemjs@^7.3.4", "@babel/plugin-transform-modules-systemjs@^7.4.0":
+"@babel/plugin-transform-modules-systemjs@^7.3.4":
   version "7.4.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-modules-systemjs/-/plugin-transform-modules-systemjs-7.4.0.tgz#c2495e55528135797bc816f5d50f851698c586a1"
   integrity sha512-gjPdHmqiNhVoBqus5qK60mWPp1CmYWp/tkh11mvb0rrys01HycEGD7NvvSoKXlWEfSM9TcL36CpsK8ElsADptQ==
@@ -824,7 +804,7 @@
     "@babel/helper-module-transforms" "^7.1.0"
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-named-capturing-groups-regex@^7.3.0", "@babel/plugin-transform-named-capturing-groups-regex@^7.4.2":
+"@babel/plugin-transform-named-capturing-groups-regex@^7.3.0":
   version "7.4.2"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-named-capturing-groups-regex/-/plugin-transform-named-capturing-groups-regex-7.4.2.tgz#800391136d6cbcc80728dbdba3c1c6e46f86c12e"
   integrity sha512-NsAuliSwkL3WO2dzWTOL1oZJHm0TM8ZY8ZSxk2ANyKkt5SQlToGA4pzctmq1BEjoacurdwZ3xp2dCQWJkME0gQ==
@@ -838,7 +818,7 @@
   dependencies:
     regexp-tree "^0.1.6"
 
-"@babel/plugin-transform-new-target@^7.0.0", "@babel/plugin-transform-new-target@^7.4.0":
+"@babel/plugin-transform-new-target@^7.0.0":
   version "7.4.0"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-new-target/-/plugin-transform-new-target-7.4.0.tgz#67658a1d944edb53c8d4fa3004473a0dd7838150"
   integrity sha512-6ZKNgMQmQmrEX/ncuCwnnw1yVGoaOW5KpxNhoWI7pCQdA0uZ0HqHGqenCUIENAnxRjy2WwNQ30gfGdIgqJXXqw==
@@ -868,7 +848,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/helper-replace-supers" "^7.5.5"
 
-"@babel/plugin-transform-parameters@^7.2.0", "@babel/plugin-transform-parameters@^7.4.3":
+"@babel/plugin-transform-parameters@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-parameters/-/plugin-transform-parameters-7.4.3.tgz#e5ff62929fdf4cf93e58badb5e2430303003800d"
   integrity sha512-ULJYC2Vnw96/zdotCZkMGr2QVfKpIT/4/K+xWWY0MbOJyMZuk660BGkr3bEKWQrrciwz6xpmft39nA4BF7hJuA==
@@ -925,7 +905,7 @@
     "@babel/helper-plugin-utils" "^7.0.0"
     "@babel/plugin-syntax-jsx" "^7.2.0"
 
-"@babel/plugin-transform-regenerator@^7.3.4", "@babel/plugin-transform-regenerator@^7.4.3":
+"@babel/plugin-transform-regenerator@^7.3.4":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-regenerator/-/plugin-transform-regenerator-7.4.3.tgz#2a697af96887e2bbf5d303ab0221d139de5e739c"
   integrity sha512-kEzotPuOpv6/iSlHroCDydPkKYw7tiJGKlmYp6iJn4a6C/+b2FdttlJsLKYxolYHgotTJ5G5UY5h0qey5ka3+A==
@@ -991,7 +971,7 @@
   dependencies:
     "@babel/helper-plugin-utils" "^7.0.0"
 
-"@babel/plugin-transform-unicode-regex@^7.2.0", "@babel/plugin-transform-unicode-regex@^7.4.3":
+"@babel/plugin-transform-unicode-regex@^7.2.0":
   version "7.4.3"
   resolved "https://registry.yarnpkg.com/@babel/plugin-transform-unicode-regex/-/plugin-transform-unicode-regex-7.4.3.tgz#3868703fc0e8f443dda65654b298df576f7b863b"
   integrity sha512-lnSNgkVjL8EMtnE8eSS7t2ku8qvKH3eqNf/IwIfnSPUqzgqYmRwzdsQWv4mNQAN9Nuo6Gz1Y0a4CSmdpu1Pp6g==
@@ -1066,60 +1046,6 @@
     js-levenshtein "^1.1.3"
     semver "^5.3.0"
 
-"@babel/preset-env@^7.4.3":
-  version "7.4.3"
-  resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.4.3.tgz#e71e16e123dc0fbf65a52cbcbcefd072fbd02880"
-  integrity sha512-FYbZdV12yHdJU5Z70cEg0f6lvtpZ8jFSDakTm7WXeJbLXh4R0ztGEu/SW7G1nJ2ZvKwDhz8YrbA84eYyprmGqw==
-  dependencies:
-    "@babel/helper-module-imports" "^7.0.0"
-    "@babel/helper-plugin-utils" "^7.0.0"
-    "@babel/plugin-proposal-async-generator-functions" "^7.2.0"
-    "@babel/plugin-proposal-json-strings" "^7.2.0"
-    "@babel/plugin-proposal-object-rest-spread" "^7.4.3"
-    "@babel/plugin-proposal-optional-catch-binding" "^7.2.0"
-    "@babel/plugin-proposal-unicode-property-regex" "^7.4.0"
-    "@babel/plugin-syntax-async-generators" "^7.2.0"
-    "@babel/plugin-syntax-json-strings" "^7.2.0"
-    "@babel/plugin-syntax-object-rest-spread" "^7.2.0"
-    "@babel/plugin-syntax-optional-catch-binding" "^7.2.0"
-    "@babel/plugin-transform-arrow-functions" "^7.2.0"
-    "@babel/plugin-transform-async-to-generator" "^7.4.0"
-    "@babel/plugin-transform-block-scoped-functions" "^7.2.0"
-    "@babel/plugin-transform-block-scoping" "^7.4.0"
-    "@babel/plugin-transform-classes" "^7.4.3"
-    "@babel/plugin-transform-computed-properties" "^7.2.0"
-    "@babel/plugin-transform-destructuring" "^7.4.3"
-    "@babel/plugin-transform-dotall-regex" "^7.4.3"
-    "@babel/plugin-transform-duplicate-keys" "^7.2.0"
-    "@babel/plugin-transform-exponentiation-operator" "^7.2.0"
-    "@babel/plugin-transform-for-of" "^7.4.3"
-    "@babel/plugin-transform-function-name" "^7.4.3"
-    "@babel/plugin-transform-literals" "^7.2.0"
-    "@babel/plugin-transform-member-expression-literals" "^7.2.0"
-    "@babel/plugin-transform-modules-amd" "^7.2.0"
-    "@babel/plugin-transform-modules-commonjs" "^7.4.3"
-    "@babel/plugin-transform-modules-systemjs" "^7.4.0"
-    "@babel/plugin-transform-modules-umd" "^7.2.0"
-    "@babel/plugin-transform-named-capturing-groups-regex" "^7.4.2"
-    "@babel/plugin-transform-new-target" "^7.4.0"
-    "@babel/plugin-transform-object-super" "^7.2.0"
-    "@babel/plugin-transform-parameters" "^7.4.3"
-    "@babel/plugin-transform-property-literals" "^7.2.0"
-    "@babel/plugin-transform-regenerator" "^7.4.3"
-    "@babel/plugin-transform-reserved-words" "^7.2.0"
-    "@babel/plugin-transform-shorthand-properties" "^7.2.0"
-    "@babel/plugin-transform-spread" "^7.2.0"
-    "@babel/plugin-transform-sticky-regex" "^7.2.0"
-    "@babel/plugin-transform-template-literals" "^7.2.0"
-    "@babel/plugin-transform-typeof-symbol" "^7.2.0"
-    "@babel/plugin-transform-unicode-regex" "^7.4.3"
-    "@babel/types" "^7.4.0"
-    browserslist "^4.5.2"
-    core-js-compat "^3.0.0"
-    invariant "^2.2.2"
-    js-levenshtein "^1.1.3"
-    semver "^5.5.0"
-
 "@babel/preset-env@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/preset-env/-/preset-env-7.5.5.tgz#bc470b53acaa48df4b8db24a570d6da1fef53c9a"
@@ -1195,18 +1121,6 @@
     "@babel/plugin-transform-react-jsx-self" "^7.0.0"
     "@babel/plugin-transform-react-jsx-source" "^7.0.0"
 
-"@babel/register@^7.0.0":
-  version "7.4.0"
-  resolved "https://registry.yarnpkg.com/@babel/register/-/register-7.4.0.tgz#d9d0a621db268fb14200f2685a4f8924c822404c"
-  integrity sha512-ekziebXBnS/7V6xk8sBfLSSD6YZuy6P29igBtR6OL/tswKdxOV+Yqq0nzICMguVYtGRZYUCGpfGV8J9Za2iBdw==
-  dependencies:
-    core-js "^3.0.0"
-    find-cache-dir "^2.0.0"
-    lodash "^4.17.11"
-    mkdirp "^0.5.1"
-    pirates "^4.0.0"
-    source-map-support "^0.5.9"
-
 "@babel/register@^7.5.5":
   version "7.5.5"
   resolved "https://registry.yarnpkg.com/@babel/register/-/register-7.5.5.tgz#40fe0d474c8c8587b28d6ae18a03eddad3dac3c1"
@@ -1777,11 +1691,6 @@ ansistyles@~0.1.3:
   resolved "https://registry.yarnpkg.com/ansistyles/-/ansistyles-0.1.3.tgz#5de60415bda071bb37127854c864f41b23254539"
   integrity sha1-XeYEFb2gcbs3EnhUyGT0GyMlRTk=
 
-any-promise@^1.0.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/any-promise/-/any-promise-1.3.0.tgz#abc6afeedcea52e809cdc0376aed3ce39635d17f"
-  integrity sha1-q8av7tzqUugJzcA3au0845Y10X8=
-
 anymatch@^2.0.0:
   version "2.0.0"
   resolved "https://registry.yarnpkg.com/anymatch/-/anymatch-2.0.0.tgz#bcb24b4f37934d9aa7ac17b4adaf89e7c76ef2eb"
@@ -2116,18 +2025,6 @@ babel-plugin-package-name-import@^1.0.3:
     babel-runtime "^6.25.0"
     find-nearest-package-json "^2.0.1"
 
-babel-preset-diff@^6.1.1:
-  version "6.1.2"
-  resolved "https://registry.yarnpkg.com/babel-preset-diff/-/babel-preset-diff-6.1.2.tgz#5d2b3668946b2304d950d246af56e13ca771268a"
-  integrity sha512-ZzCFp7UExvzOe7SsYneV5ESVvC11WYRNQkR/7gd3ojL1zkmflwN6848e7FsavS4QO4Xfob0yTQYpaztjkIKDqQ==
-  dependencies:
-    "@babel/core" "^7.4.3"
-    "@babel/plugin-syntax-dynamic-import" "^7.2.0"
-    "@babel/preset-env" "^7.4.3"
-    "@babel/preset-flow" "^7.0.0"
-    "@babel/preset-react" "^7.0.0"
-    babel-plugin-package-name-import "^1.0.3"
-
 babel-preset-diff@^6.2.0:
   version "6.2.0"
   resolved "https://registry.yarnpkg.com/babel-preset-diff/-/babel-preset-diff-6.2.0.tgz#eadd0f91c4a00e6c3120e241f07179d58d3a905b"
@@ -2430,7 +2327,7 @@ browserify-zlib@^0.2.0:
   dependencies:
     pako "~1.0.5"
 
-browserslist@^4.0.0, browserslist@^4.1.0, browserslist@^4.3.4, browserslist@^4.5.2, browserslist@^4.5.4:
+browserslist@^4.0.0, browserslist@^4.1.0, browserslist@^4.3.4:
   version "4.5.5"
   resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.5.5.tgz#fe1a352330d2490d5735574c149a85bc18ef9b82"
   integrity sha512-0QFO1r/2c792Ohkit5XI8Cm8pDtZxgNl2H6HU4mHrpYz7314pEYcsAVVatM0l/YmxPnEzh9VygXouj4gkFUTKA==
@@ -2510,17 +2407,16 @@ buffers@~0.1.1:
   resolved "https://registry.yarnpkg.com/buffers/-/buffers-0.1.1.tgz#b24579c3bed4d6d396aeee6d9a8ae7f5482ab7bb"
   integrity sha1-skV5w77U1tOWru5tmorn9Ugqt7s=
 
-build-esm@^4.2.1:
-  version "4.2.1"
-  resolved "https://registry.yarnpkg.com/build-esm/-/build-esm-4.2.1.tgz#ad59dcfe3c6e8e671de7387c8d897d1255c19e3b"
-  integrity sha512-fHUYiHgskY8w0alIgV4pFrbTRY29s6K/yeIIAxG5QF4YS8gGdbc3iZfIRyxBeVQu49w0E/mUtbiLgqqKA5rUwQ==
+build-esm@^4.2.2:
+  version "4.2.2"
+  resolved "https://registry.yarnpkg.com/build-esm/-/build-esm-4.2.2.tgz#55a51a3290f9b56cc7e1194d6bdbc225b75f3aa8"
+  integrity sha512-KL8SymX1ohWJO2zOq5rVkdMrlu/N1IcxKIyjCa9Huq4oxKMEx6K3RSdMlS1t0xodRWke1toWzgdSCWTw2Zu22g==
   dependencies:
-    "@babel/core" "^7.2.2"
+    "@babel/core" "^7.5.5"
     mkdirp "^0.5.1"
-    mz "^2.7.0"
-    npm-packlist "^1.2.0"
-    overdub "^2.3.0"
-    rimraf "^2.6.3"
+    npm-packlist "^1.4.4"
+    overdub "^2.5.1"
+    rimraf "^3.0.0"
 
 builtin-modules@^1.0.0:
   version "1.1.1"
@@ -3301,16 +3197,6 @@ core-assert@^0.2.0:
     buf-compare "^1.0.0"
     is-error "^2.2.0"
 
-core-js-compat@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/core-js-compat/-/core-js-compat-3.0.1.tgz#bff73ba31ca8687431b9c88f78d3362646fb76f0"
-  integrity sha512-2pC3e+Ht/1/gD7Sim/sqzvRplMiRnFQVlPpDVaHtY9l7zZP7knamr3VRD6NyGfHd84MrDC0tAM9ulNxYMW0T3g==
-  dependencies:
-    browserslist "^4.5.4"
-    core-js "3.0.1"
-    core-js-pure "3.0.1"
-    semver "^6.0.0"
-
 core-js-compat@^3.1.1:
   version "3.1.4"
   resolved "https://registry.yarnpkg.com/core-js-compat/-/core-js-compat-3.1.4.tgz#e4d0c40fbd01e65b1d457980fe4112d4358a7408"
@@ -3320,21 +3206,11 @@ core-js-compat@^3.1.1:
     core-js-pure "3.1.4"
     semver "^6.1.1"
 
-core-js-pure@3.0.1:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/core-js-pure/-/core-js-pure-3.0.1.tgz#37358fb0d024e6b86d443d794f4e37e949098cbe"
-  integrity sha512-mSxeQ6IghKW3MoyF4cz19GJ1cMm7761ON+WObSyLfTu/Jn3x7w4NwNFnrZxgl4MTSvYYepVLNuRtlB4loMwJ5g==
-
 core-js-pure@3.1.4:
   version "3.1.4"
   resolved "https://registry.yarnpkg.com/core-js-pure/-/core-js-pure-3.1.4.tgz#5fa17dc77002a169a3566cc48dc774d2e13e3769"
   integrity sha512-uJ4Z7iPNwiu1foygbcZYJsJs1jiXrTTCvxfLDXNhI/I+NHbSIEyr548y4fcsCEyWY0XgfAG/qqaunJ1SThHenA==
 
-core-js@3.0.1, core-js@^3.0.0:
-  version "3.0.1"
-  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.0.1.tgz#1343182634298f7f38622f95e73f54e48ddf4738"
-  integrity sha512-sco40rF+2KlE0ROMvydjkrVMMG1vYilP2ALoRXcYR4obqbYIuV3Bg+51GEDW+HF8n7NRA+iaA4qD0nD9lo9mew==
-
 core-js@^2.0.0, core-js@^2.4.0:
   version "2.6.5"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.5.tgz#44bc8d249e7fb2ff5d00e0341a7ffb94fbf67895"
@@ -3345,6 +3221,11 @@ core-js@^2.6.5:
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-2.6.8.tgz#dc3a1e633a04267944e0cb850d3880f340248139"
   integrity sha512-RWlREFU74TEkdXzyl1bka66O3kYp8jeTXrvJZDzVVMH8AiHUSOFpL1yfhQJ+wHocAm1m+4971W1PPzfLuCv1vg==
 
+core-js@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.0.1.tgz#1343182634298f7f38622f95e73f54e48ddf4738"
+  integrity sha512-sco40rF+2KlE0ROMvydjkrVMMG1vYilP2ALoRXcYR4obqbYIuV3Bg+51GEDW+HF8n7NRA+iaA4qD0nD9lo9mew==
+
 core-js@^3.2.1:
   version "3.2.1"
   resolved "https://registry.yarnpkg.com/core-js/-/core-js-3.2.1.tgz#cd41f38534da6cc59f7db050fe67307de9868b09"
@@ -4918,10 +4799,10 @@ flatted@^2.0.0:
   resolved "https://registry.yarnpkg.com/flatted/-/flatted-2.0.0.tgz#55122b6536ea496b4b44893ee2608141d10d9916"
   integrity sha512-R+H8IZclI8AAkSBRQJLVOsxwAoHd6WC40b4QTNWIjzAa6BXOBfQcM587MXDTVPeYaopFNWHUFLx7eNmHDSxMWg==
 
-flow-bin@^0.106.2:
-  version "0.106.2"
-  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.106.2.tgz#624db7c04b00879ac14853434817c7bc5e1419db"
-  integrity sha512-pALWFKf+AQiX4VfSEdxruj2bSMigsrAcg8djV6Hue2y3FJyiA/Z42UkEv6zEvSIpDj1EL+cRBvJNUx6L2+gdTQ==
+flow-bin@^0.106.3:
+  version "0.106.3"
+  resolved "https://registry.yarnpkg.com/flow-bin/-/flow-bin-0.106.3.tgz#87b5647bc23ae0efceabb6c50490c02a8478960c"
+  integrity sha512-QDwmhsMmiASmwgr6r2WTz9RPsN0pb84PY0whz0JqFaBX7/Fx2wj2MOtjbR2yv+qWZnozP9U40Jd9LLt8rC3WSQ==
 
 flow-typed@^2.6.1:
   version "2.6.1"
@@ -7388,15 +7269,6 @@ mute-stream@~0.0.4:
   resolved "https://registry.yarnpkg.com/mute-stream/-/mute-stream-0.0.8.tgz#1630c42b2251ff81e2a283de96a5497ea92e5e0d"
   integrity sha512-nnbWWOkoWyUsTjKrhgD0dcz22mdkSnpYqbEjIm2nhwhuxlSkpywJmBo8h0ZqJdkp73mb90SssHkN4rsRaBAfAA==
 
-mz@^2.7.0:
-  version "2.7.0"
-  resolved "https://registry.yarnpkg.com/mz/-/mz-2.7.0.tgz#95008057a56cafadc2bc63dde7f9ff6955948e32"
-  integrity sha512-z81GNO7nnYMEhrGh9LeymoE4+Yr0Wn5McHIZMK5cfQCl+NDX08sCZgUc9/6MHni9IWuFLm1Z3HTCXu2z9fN62Q==
-  dependencies:
-    any-promise "^1.0.0"
-    object-assign "^4.0.1"
-    thenify-all "^1.0.0"
-
 nan@^2.12.1, nan@^2.13.2:
   version "2.13.2"
   resolved "https://registry.yarnpkg.com/nan/-/nan-2.13.2.tgz#f51dc7ae66ba7d5d55e1e6d4d8092e802c9aefe7"
@@ -7713,7 +7585,7 @@ npm-logical-tree@^1.2.1:
     semver "^5.5.0"
     validate-npm-package-name "^3.0.0"
 
-npm-packlist@^1.1.10, npm-packlist@^1.1.12, npm-packlist@^1.1.6, npm-packlist@^1.2.0:
+npm-packlist@^1.1.10, npm-packlist@^1.1.12, npm-packlist@^1.1.6:
   version "1.4.1"
   resolved "https://registry.yarnpkg.com/npm-packlist/-/npm-packlist-1.4.1.tgz#19064cdf988da80ea3cee45533879d90192bbfbc"
   integrity sha512-+TcdO7HJJ8peiiYhvPxsEDhF3PJFGUGRcFsGve3vxvxdcpO2Z4Z7rkosRM0kWj6LfbK/P0gu3dzk5RU1ffvFcw==
@@ -7721,6 +7593,14 @@ npm-packlist@^1.1.10, npm-packlist@^1.1.12, npm-packlist@^1.1.6, npm-packlist@^1
     ignore-walk "^3.0.1"
     npm-bundled "^1.0.1"
 
+npm-packlist@^1.4.4:
+  version "1.4.4"
+  resolved "https://registry.yarnpkg.com/npm-packlist/-/npm-packlist-1.4.4.tgz#866224233850ac534b63d1a6e76050092b5d2f44"
+  integrity sha512-zTLo8UcVYtDU3gdeaFu2Xu0n0EvelfHDGuqtNIn5RO7yQj4H1TqNdBc/yZjxnWA0PVB8D3Woyp0i5B43JwQ6Vw==
+  dependencies:
+    ignore-walk "^3.0.1"
+    npm-bundled "^1.0.1"
+
 npm-pick-manifest@^2.1.0:
   version "2.2.3"
   resolved "https://registry.yarnpkg.com/npm-pick-manifest/-/npm-pick-manifest-2.2.3.tgz#32111d2a9562638bb2c8f2bf27f7f3092c8fae40"
@@ -8172,15 +8052,6 @@ osenv@0, osenv@^0.1.4, osenv@^0.1.5:
     os-homedir "^1.0.0"
     os-tmpdir "^1.0.0"
 
-overdub@^2.3.0:
-  version "2.3.0"
-  resolved "https://registry.yarnpkg.com/overdub/-/overdub-2.3.0.tgz#8f55c7d64798d6b4c679cd74a4f0970cd428b58a"
-  integrity sha512-85qdO1bkqicbOLsk73p+/J06doaXlD6JKYfp3Ku5Nultn7gRtFLdB5FIcerOs5q8/dCukF80HTvOlHI7qlsmIA==
-  dependencies:
-    "@babel/core" "^7.2.2"
-    "@babel/register" "^7.0.0"
-    babel-preset-diff "^6.1.1"
-
 overdub@^2.5.1:
   version "2.5.1"
   resolved "https://registry.yarnpkg.com/overdub/-/overdub-2.5.1.tgz#43083a5e8e4aa054b24608e883880203d16dc8bf"
@@ -9979,6 +9850,13 @@ rimraf@2, rimraf@2.6.3, rimraf@^2.5.2, rimraf@^2.5.4, rimraf@^2.6.1, rimraf@^2.6
   dependencies:
     glob "^7.1.3"
 
+rimraf@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/rimraf/-/rimraf-3.0.0.tgz#614176d4b3010b75e5c390eb0ee96f6dc0cebb9b"
+  integrity sha512-NDGVxTsjqfunkds7CqsOiEnxln4Bo7Nddl3XhS4pXg5OzwkLqJ971ZVAAnB+DDLnF76N+VnDEiBHaVV8I06SUg==
+  dependencies:
+    glob "^7.1.3"
+
 ripemd160@^2.0.0, ripemd160@^2.0.1:
   version "2.0.2"
   resolved "https://registry.yarnpkg.com/ripemd160/-/ripemd160-2.0.2.tgz#a1c1a6f624751577ba5d07914cbc92850585890c"
@@ -11026,20 +10904,6 @@ text-table@^0.2.0, text-table@~0.2.0:
   resolved "https://registry.yarnpkg.com/text-table/-/text-table-0.2.0.tgz#7f5ee823ae805207c00af2df4a84ec3fcfa570b4"
   integrity sha1-f17oI66AUgfACvLfSoTsP8+lcLQ=
 
-thenify-all@^1.0.0:
-  version "1.6.0"
-  resolved "https://registry.yarnpkg.com/thenify-all/-/thenify-all-1.6.0.tgz#1a1918d402d8fc3f98fbf234db0bcc8cc10e9726"
-  integrity sha1-GhkY1ALY/D+Y+/I02wvMjMEOlyY=
-  dependencies:
-    thenify ">= 3.1.0 < 4"
-
-"thenify@>= 3.1.0 < 4":
-  version "3.3.0"
-  resolved "https://registry.yarnpkg.com/thenify/-/thenify-3.3.0.tgz#e69e38a1babe969b0108207978b9f62b88604839"
-  integrity sha1-5p44obq+lpsBCCB5eLn2K4hgSDk=
-  dependencies:
-    any-promise "^1.0.0"
-
 theredoc@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/theredoc/-/theredoc-1.0.0.tgz#bcace376af6feb1873efbdd0f91ed026570ff062"