webpack: Move CSS minification to optimization stage.

andersk · andersk · commit 177eb2e02ef8 · 2019-09-02T21:58:13.000-07:00
Otherwise Bootstrap doesn’t get minified, and also the minification
state is incorrectly reflected in the webpack cache.

The Terser plugin is used by default; we need to include it explicitly
to avoid removing it.

Switch from cssnano to clean-css because it’s noticeably faster.

Signed-off-by: Anders Kaseorg &lt;anders@zulipchat.com&gt;
diff --git a/package.json b/package.json
@@ -18,10 +18,10 @@
     "babel-loader": "^8.0.6",
     "blueimp-md5": "^2.10.0",
     "cache-loader": "^4.0.0",
+    "clean-css": "^4.2.1",
     "clipboard": "^2.0.4",
     "core-js": "^3.0.1",
     "css-loader": "^2.1.1",
-    "cssnano": "^4.1.10",
     "emoji-datasource-google": "^4.0.4",
     "emoji-datasource-google-blob": "npm:emoji-datasource-google@^3.0.0",
     "emoji-datasource-twitter": "^4.0.4",
@@ -42,6 +42,7 @@
     "mini-css-extract-plugin": "^0.6.0",
     "moment": "^2.24.0",
     "moment-timezone": "^0.5.25",
+    "optimize-css-assets-webpack-plugin": "^5.0.3",
     "plotly.js": "^1.48.1",
     "postcss-calc": "^7.0.1",
     "postcss-extend-rule": "^3.0.0",
@@ -57,6 +58,7 @@
     "source-sans-pro": "^2.45.0",
     "spectrum-colorpicker": "^1.8.0",
     "style-loader": "^0.23.1",
+    "terser-webpack-plugin": "^1.4.1",
     "to-markdown": "^3.1.0",
     "ts-node": "^7.0.1",
     "typescript": "^3.5.1",
diff --git a/postcss.config.js b/postcss.config.js
@@ -1,4 +1,4 @@
-module.exports = ({ file, options }) => ({
+module.exports = ({ file }) => ({
     parser: file.extname === ".scss" ? "postcss-scss" : false,
     plugins: {
         // Warning: despite appearances, order is significant
@@ -7,6 +7,5 @@ module.exports = ({ file, options }) => ({
         "postcss-simple-vars": {},
         "postcss-calc": {},
         autoprefixer: {},
-        cssnano: options.env === "production" ? {} : false,
     },
 });
diff --git a/tools/webpack.config.ts b/tools/webpack.config.ts
@@ -1,11 +1,14 @@
-import { resolve } from 'path';
+import { basename, resolve } from 'path';
 import * as BundleTracker from 'webpack-bundle-tracker';
 import * as webpack from 'webpack';
 // The devServer member of webpack.Configuration is managed by the
 // webpack-dev-server package. We are only importing the type here.
 import * as _webpackDevServer from 'webpack-dev-server';
 import { getExposeLoaders, cacheLoader } from './webpack-helpers';
 import * as MiniCssExtractPlugin from 'mini-css-extract-plugin';
+import * as OptimizeCssAssetsPlugin from 'optimize-css-assets-webpack-plugin';
+import * as CleanCss from 'clean-css';
+import * as TerserPlugin from 'terser-webpack-plugin';
 
 const assets = require('./webpack.assets.json');
 
@@ -91,9 +94,6 @@ export default (env?: string): webpack.Configuration[] => {
                             loader: 'postcss-loader',
                             options: {
                                 sourceMap: true,
-                                config: {
-                                    ctx: { env },
-                                },
                             },
                         },
                     ],
@@ -137,6 +137,44 @@ export default (env?: string): webpack.Configuration[] => {
         // We prefer it over eval since eval has trouble setting
         // breakpoints in chrome.
         devtool: production ? 'source-map' : 'cheap-module-source-map',
+        optimization: {
+            minimizer: [
+                // Based on a comment in NMFR/optimize-css-assets-webpack-plugin#10.
+                // Can be simplified when NMFR/optimize-css-assets-webpack-plugin#87
+                // is fixed.
+                new OptimizeCssAssetsPlugin({
+                    cssProcessor: {
+                        process: async (css, options) => {
+                            const filename = basename(options.to);
+                            const result = await new CleanCss(options).minify({
+                                [filename]: {
+                                    styles: css,
+                                    sourceMap: options.map.prev,
+                                },
+                            });
+                            for (const warning of result.warnings) {
+                                console.warn(warning);
+                            }
+                            return {
+                                css: result.styles + `\n/*# sourceMappingURL=${filename}.map */`,
+                                map: result.sourceMap,
+                            };
+                        },
+                    },
+                    cssProcessorOptions: {
+                        map: {},
+                        returnPromise: true,
+                        sourceMap: true,
+                        sourceMapInlineSources: true,
+                    },
+                }),
+                new TerserPlugin({
+                    cache: true,
+                    parallel: true,
+                    sourceMap: true,
+                }),
+            ],
+        },
     };
 
     // Expose Global variables for third party libraries to webpack modules
diff --git a/version.py b/version.py
@@ -26,4 +26,4 @@
 #   historical commits sharing the same major version, in which case a
 #   minor version bump suffices.
 
-PROVISION_VERSION = '54.2'
+PROVISION_VERSION = '54.3'
diff --git a/yarn.lock b/yarn.lock
@@ -1738,7 +1738,7 @@ block-stream@*:
   dependencies:
     inherits "~2.0.0"
 
-bluebird@^3.5.3:
+bluebird@^3.5.5:
   version "3.5.5"
   resolved "https://registry.yarnpkg.com/bluebird/-/bluebird-3.5.5.tgz#a8d0afd73251effbbd5fe384a77d73003c17a71f"
   integrity sha512-5am6HnnfN+urzt4yfg7IgTbotDjIT/u8AJpEt0sIU9FtXfVeezXAPKswrG+xKUCOYAINpSdgZVDU6QFh+cuH3w==
@@ -1912,13 +1912,13 @@ browserify-zlib@^0.2.0:
     pako "~1.0.5"
 
 browserslist@^4.0.0, browserslist@^4.6.0, browserslist@^4.6.2, browserslist@^4.6.3:
-  version "4.6.6"
-  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.6.6.tgz#6e4bf467cde520bc9dbdf3747dafa03531cec453"
-  integrity sha512-D2Nk3W9JL9Fp/gIcWei8LrERCS+eXu9AM5cfXA8WEZ84lFks+ARnZ0q/R69m2SV3Wjma83QDDPxsNKXUwdIsyA==
+  version "4.7.0"
+  resolved "https://registry.yarnpkg.com/browserslist/-/browserslist-4.7.0.tgz#9ee89225ffc07db03409f2fee524dc8227458a17"
+  integrity sha512-9rGNDtnj+HaahxiVV38Gn8n8Lr8REKsel68v1sPFfIGEK6uSXTY3h9acgiT1dZVtOOUtifo/Dn8daDQ5dUgVsA==
   dependencies:
-    caniuse-lite "^1.0.30000984"
-    electron-to-chromium "^1.3.191"
-    node-releases "^1.1.25"
+    caniuse-lite "^1.0.30000989"
+    electron-to-chromium "^1.3.247"
+    node-releases "^1.1.29"
 
 buble@^0.19.3:
   version "0.19.3"
@@ -2002,22 +2002,23 @@ bytes@3.1.0:
   resolved "https://registry.yarnpkg.com/bytes/-/bytes-3.1.0.tgz#f6cf7933a360e0588fa9fde85651cdc7f805d1f6"
   integrity sha512-zauLjrfCG+xvoyaqLoV8bLVXXNGC4JqlxFCutSDWA6fJrTo2ZuvLYTqZ7aHBLZSMOopbzwv8f+wZcVzfVTI2Dg==
 
-cacache@^11.3.2:
-  version "11.3.2"
-  resolved "https://registry.yarnpkg.com/cacache/-/cacache-11.3.2.tgz#2d81e308e3d258ca38125b676b98b2ac9ce69bfa"
-  integrity sha512-E0zP4EPGDOaT2chM08Als91eYnf8Z+eH1awwwVsngUmgppfM5jjJ8l3z5vO5p5w/I3LsiXawb1sW0VY65pQABg==
+cacache@^12.0.2:
+  version "12.0.3"
+  resolved "https://registry.yarnpkg.com/cacache/-/cacache-12.0.3.tgz#be99abba4e1bf5df461cd5a2c1071fc432573390"
+  integrity sha512-kqdmfXEGFepesTuROHMs3MpFLWrPkSSpRqOw80RCflZXy/khxaArvFrQ7uJxSUduzAufc6G0g1VUCOZXxWavPw==
   dependencies:
-    bluebird "^3.5.3"
+    bluebird "^3.5.5"
     chownr "^1.1.1"
     figgy-pudding "^3.5.1"
-    glob "^7.1.3"
+    glob "^7.1.4"
     graceful-fs "^4.1.15"
+    infer-owner "^1.0.3"
     lru-cache "^5.1.1"
     mississippi "^3.0.0"
     mkdirp "^0.5.1"
     move-concurrently "^1.0.1"
     promise-inflight "^1.0.1"
-    rimraf "^2.6.2"
+    rimraf "^2.6.3"
     ssri "^6.0.1"
     unique-filename "^1.1.1"
     y18n "^4.0.0"
@@ -2127,7 +2128,7 @@ caniuse-api@^3.0.0:
     lodash.memoize "^4.1.2"
     lodash.uniq "^4.5.0"
 
-caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000980, caniuse-lite@^1.0.30000984:
+caniuse-lite@^1.0.0, caniuse-lite@^1.0.30000980, caniuse-lite@^1.0.30000989:
   version "1.0.30000989"
   resolved "https://registry.yarnpkg.com/caniuse-lite/-/caniuse-lite-1.0.30000989.tgz#b9193e293ccf7e4426c5245134b8f2a56c0ac4b9"
   integrity sha512-vrMcvSuMz16YY6GSVZ0dWDTJP8jqk3iFQ/Aq5iqblPwxSVVZI+zxDyTX0VPqtQsDnfdrBDcsmhgTEOh5R8Lbpw==
@@ -2286,6 +2287,13 @@ class-utils@^0.3.5:
     isobject "^3.0.0"
     static-extend "^0.1.1"
 
+clean-css@^4.2.1:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/clean-css/-/clean-css-4.2.1.tgz#2d411ef76b8569b6d0c84068dabe85b0aa5e5c17"
+  integrity sha512-4ZxI6dy4lrY6FHzfiy1aEOXgu4LIsW2MhwG0VBKdcoGoH/XLFgaHSdLTGr4O8Be6A8r3MOphEiI8Gc1n0ecf3g==
+  dependencies:
+    source-map "~0.6.0"
+
 clean-pslg@^1.1.0:
   version "1.1.2"
   resolved "https://registry.yarnpkg.com/clean-pslg/-/clean-pslg-1.1.2.tgz#bd35c7460b7e8ab5a9f761a5ed51796aa3c86c11"
@@ -2481,7 +2489,7 @@ combined-stream@^1.0.6, combined-stream@~1.0.6:
   dependencies:
     delayed-stream "~1.0.0"
 
-commander@2, commander@2.x.x, commander@^2.10.0, commander@^2.15.1, commander@^2.19.0, commander@^2.7.1, commander@^2.9.0, commander@~2.20.0:
+commander@2, commander@2.x.x, commander@^2.10.0, commander@^2.15.1, commander@^2.19.0, commander@^2.20.0, commander@^2.7.1, commander@^2.9.0, commander@~2.20.0:
   version "2.20.0"
   resolved "https://registry.yarnpkg.com/commander/-/commander-2.20.0.tgz#d58bb2b5c1ee8f87b0d340027e9e94e222c5a422"
   integrity sha512-7j2y+40w61zy6YC2iRNpUe/NwhNyoXrYpHMrSunaMG64nRnaf96zO/KMQR4OyN/UnE5KLyEBnKHd4aG3rskjpQ==
@@ -3520,10 +3528,10 @@ ee-first@1.1.1:
   resolved "https://registry.yarnpkg.com/ee-first/-/ee-first-1.1.1.tgz#590c61156b0ae2f4f0255732a158b266bc56b21d"
   integrity sha1-WQxhFWsK4vTwJVcyoViyZrxWsh0=
 
-electron-to-chromium@^1.3.191:
-  version "1.3.196"
-  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.196.tgz#1a7885855880fa3ae7a8908c442757e561eec82b"
-  integrity sha512-NFGRHzY0x8yIUFnAthKxaOKe5q+c8jjvyQM2pMq2+59QORz8AN5+qXPJBwX05kz2uEtyraX2XxB0LPT+7EE6vw==
+electron-to-chromium@^1.3.247:
+  version "1.3.251"
+  resolved "https://registry.yarnpkg.com/electron-to-chromium/-/electron-to-chromium-1.3.251.tgz#8dbfe0d5c5d884c456d3d8d83fcb3258ab9eba3a"
+  integrity sha512-C5oOBdqJTYago4PBeew9duLqWZ3SlDnTRM+PMIgZd/ILFrT5AfaAGd3jRNEfuPklFHFqOjfwbCvXpyzEYb5sXg==
 
 element-size@^1.1.1:
   version "1.1.1"
@@ -4923,7 +4931,7 @@ glob-to-regexp@^0.3.0:
   resolved "https://registry.yarnpkg.com/glob-to-regexp/-/glob-to-regexp-0.3.0.tgz#8c5a1494d2066c570cc3bfe4496175acc4d502ab"
   integrity sha1-jFoUlNIGbFcMw7/kSWF1rMTVAqs=
 
-glob@^7.0.3, glob@^7.0.5, glob@^7.1.1, glob@^7.1.3, glob@~7.1.2:
+glob@^7.0.3, glob@^7.0.5, glob@^7.1.1, glob@^7.1.3, glob@^7.1.4, glob@~7.1.2:
   version "7.1.4"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.4.tgz#aa608a2f6c577ad357e1ae5a5c26d9a8d1969255"
   integrity sha512-hkLPepehmnKk41pUGm3sYxoFs/umurYfYJCerbXEyFIWcAzvpipAgVkBqqT9RBKMGjnq6kMuyYwha6csxbiM1A==
@@ -5643,6 +5651,11 @@ indexof@0.0.1:
   resolved "https://registry.yarnpkg.com/indexof/-/indexof-0.0.1.tgz#82dc336d232b9062179d05ab3293a66059fd435d"
   integrity sha1-gtwzbSMrkGIXnQWrMpOmYFn9Q10=
 
+infer-owner@^1.0.3:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/infer-owner/-/infer-owner-1.0.4.tgz#c4cefcaa8e51051c2a40ba2ce8a3d27295af9467"
+  integrity sha512-IClj+Xz94+d7irH5qRyfJonOdfTzuDaifE6ZPWfx0N0+/ATZCbuTPq2prFl526urkQd90WyUKIh1DfBQ2hMz9A==
+
 inflight@^1.0.4:
   version "1.0.6"
   resolved "https://registry.yarnpkg.com/inflight/-/inflight-1.0.6.tgz#49bd6331d7d02d0c09bc910a1075ba8165b56df9"
@@ -6435,6 +6448,14 @@ known-css-properties@^0.13.0:
   resolved "https://registry.yarnpkg.com/known-css-properties/-/known-css-properties-0.13.0.tgz#2750fde566cbf542a9876d4acd6bb0257ebadd2c"
   integrity sha512-6VWDxNr7cQXPDtMdCWLZMK3E8hdLrpyPPRdx6RbyvqklqgM6/XNFsVopv8QOZ+hRB6iHG/urEDwzlWbmMCv/kw==
 
+last-call-webpack-plugin@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/last-call-webpack-plugin/-/last-call-webpack-plugin-3.0.0.tgz#9742df0e10e3cf46e5c0381c2de90d3a7a2d7555"
+  integrity sha512-7KI2l2GIZa9p2spzPIVZBYyNKkN+e/SQPpnjlTiPhdbDW3F86tdKKELxKpzJ5sgU19wQWsACULZmpTPYHeWO5w==
+  dependencies:
+    lodash "^4.17.5"
+    webpack-sources "^1.1.0"
+
 lazy-cache@^1.0.3:
   version "1.0.4"
   resolved "https://registry.yarnpkg.com/lazy-cache/-/lazy-cache-1.0.4.tgz#a1d78fc3a50474cb80845d3b3b6e1da49a446e8e"
@@ -6576,7 +6597,7 @@ lodash.uniq@^4.5.0:
   resolved "https://registry.yarnpkg.com/lodash.uniq/-/lodash.uniq-4.5.0.tgz#d0225373aeb652adc1bc82e4945339a842754773"
   integrity sha1-0CJTc662Uq3BvILklFM5qEJ1R3M=
 
-lodash@^4.17.11, lodash@^4.17.13, lodash@^4.6.1:
+lodash@^4.17.11, lodash@^4.17.13, lodash@^4.17.5, lodash@^4.6.1:
   version "4.17.15"
   resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.15.tgz#b447f6670a0455bbfeedd11392eff330ea097548"
   integrity sha512-8xOcRHvCjnocdS5cpwXQXVzmmh5e5+saE2QGoeQmbKmRS6J3VQppPOIt0MnmE+4xlZoumy0GPG0D0MVIQbNA1A==
@@ -7393,10 +7414,10 @@ node-pre-gyp@^0.12.0:
     semver "^5.3.0"
     tar "^4"
 
-node-releases@^1.1.25:
-  version "1.1.25"
-  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.25.tgz#0c2d7dbc7fed30fbe02a9ee3007b8c90bf0133d3"
-  integrity sha512-fI5BXuk83lKEoZDdH3gRhtsNgh05/wZacuXkgbiYkceE7+QIMXOg98n9ZV7mz27B+kFHnqHcUpscZZlGRSmTpQ==
+node-releases@^1.1.29:
+  version "1.1.29"
+  resolved "https://registry.yarnpkg.com/node-releases/-/node-releases-1.1.29.tgz#86a57c6587a30ecd6726449e5d293466b0a0bb86"
+  integrity sha512-R5bDhzh6I+tpi/9i2hrrvGJ3yKPYzlVOORDkXhnZuwi5D3q1I5w4vYy24PJXTcLk9Q0kws9TO77T75bcK8/ysQ==
   dependencies:
     semver "^5.3.0"
 
@@ -7755,6 +7776,14 @@ optimist@^0.6.1:
     minimist "~0.0.1"
     wordwrap "~0.0.2"
 
+optimize-css-assets-webpack-plugin@^5.0.3:
+  version "5.0.3"
+  resolved "https://registry.yarnpkg.com/optimize-css-assets-webpack-plugin/-/optimize-css-assets-webpack-plugin-5.0.3.tgz#e2f1d4d94ad8c0af8967ebd7cf138dcb1ef14572"
+  integrity sha512-q9fbvCRS6EYtUKKSwI87qm2IxlyJK5b4dygW1rKUBT6mMDhdG5e5bZT63v6tnJR9F9FB/H5a0HTmtw+laUBxKA==
+  dependencies:
+    cssnano "^4.1.10"
+    last-call-webpack-plugin "^3.0.0"
+
 optionator@^0.8.1, optionator@^0.8.2:
   version "0.8.2"
   resolved "https://registry.yarnpkg.com/optionator/-/optionator-0.8.2.tgz#364c5e409d3f4d6301d6c0b4c05bba50180aeb64"
@@ -10090,10 +10119,10 @@ source-map-resolve@^0.5.0:
     source-map-url "^0.4.0"
     urix "^0.1.0"
 
-source-map-support@^0.5.6, source-map-support@~0.5.10:
-  version "0.5.12"
-  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.12.tgz#b4f3b10d51857a5af0138d3ce8003b201613d599"
-  integrity sha512-4h2Pbvyy15EE02G+JOZpUCmqWJuqrs+sEkzewTm++BPi7Hvn/HwcqLAcNxYAyI0x13CpPPn+kMjl+hplXMHITQ==
+source-map-support@^0.5.6, source-map-support@~0.5.12:
+  version "0.5.13"
+  resolved "https://registry.yarnpkg.com/source-map-support/-/source-map-support-0.5.13.tgz#31b24a9c2e73c2de85066c0feb7d44767ed52932"
+  integrity sha512-SHSKFHadjVA5oR4PPqhtAVdcBWwRYVd6g6cAXnIbRiIwc2EhPrTuKUBdSLvlEKyIP3GCf89fltvcZiP9MMFA1w==
   dependencies:
     buffer-from "^1.0.0"
     source-map "^0.6.0"
@@ -10103,7 +10132,7 @@ source-map-url@^0.4.0:
   resolved "https://registry.yarnpkg.com/source-map-url/-/source-map-url-0.4.0.tgz#3e935d7ddd73631b97659956d55128e87b5084a3"
   integrity sha1-PpNdfd1zYxuXZZlW1VEo6HtQhKM=
 
-"source-map@>= 0.1.2", source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.1:
+"source-map@>= 0.1.2", source-map@^0.6.0, source-map@^0.6.1, source-map@~0.6.0, source-map@~0.6.1:
   version "0.6.1"
   resolved "https://registry.yarnpkg.com/source-map/-/source-map-0.6.1.tgz#74722af32e9614e9c287a8d0bbde48b5e2f1a263"
   integrity sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==
@@ -10823,30 +10852,29 @@ tar@^4:
     safe-buffer "^5.1.2"
     yallist "^3.0.2"
 
-terser-webpack-plugin@^1.1.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/terser-webpack-plugin/-/terser-webpack-plugin-1.3.0.tgz#69aa22426299f4b5b3775cbed8cb2c5d419aa1d4"
-  integrity sha512-W2YWmxPjjkUcOWa4pBEv4OP4er1aeQJlSo2UhtCFQCuRXEHjOFscO8VyWHj9JLlA0RzQb8Y2/Ta78XZvT54uGg==
+terser-webpack-plugin@^1.1.0, terser-webpack-plugin@^1.4.1:
+  version "1.4.1"
+  resolved "https://registry.yarnpkg.com/terser-webpack-plugin/-/terser-webpack-plugin-1.4.1.tgz#61b18e40eaee5be97e771cdbb10ed1280888c2b4"
+  integrity sha512-ZXmmfiwtCLfz8WKZyYUuuHf3dMYEjg8NrjHMb0JqHVHVOSkzp3cW2/XG1fP3tRhqEqSzMwzzRQGtAPbs4Cncxg==
   dependencies:
-    cacache "^11.3.2"
-    find-cache-dir "^2.0.0"
+    cacache "^12.0.2"
+    find-cache-dir "^2.1.0"
     is-wsl "^1.1.0"
-    loader-utils "^1.2.3"
     schema-utils "^1.0.0"
     serialize-javascript "^1.7.0"
     source-map "^0.6.1"
-    terser "^4.0.0"
-    webpack-sources "^1.3.0"
+    terser "^4.1.2"
+    webpack-sources "^1.4.0"
     worker-farm "^1.7.0"
 
-terser@^4.0.0:
-  version "4.0.0"
-  resolved "https://registry.yarnpkg.com/terser/-/terser-4.0.0.tgz#ef356f6f359a963e2cc675517f21c1c382877374"
-  integrity sha512-dOapGTU0hETFl1tCo4t56FN+2jffoKyER9qBGoUFyZ6y7WLoKT0bF+lAYi6B6YsILcGF3q1C2FBh8QcKSCgkgA==
+terser@^4.1.2:
+  version "4.2.1"
+  resolved "https://registry.yarnpkg.com/terser/-/terser-4.2.1.tgz#1052cfe17576c66e7bc70fcc7119f22b155bdac1"
+  integrity sha512-cGbc5utAcX4a9+2GGVX4DsenG6v0x3glnDi5hx8816X1McEAwPlPgRtXPJzSBsbpILxZ8MQMT0KvArLuE0HP5A==
   dependencies:
-    commander "^2.19.0"
+    commander "^2.20.0"
     source-map "~0.6.1"
-    source-map-support "~0.5.10"
+    source-map-support "~0.5.12"
 
 test-exclude@^5.2.3:
   version "5.2.3"
@@ -11894,10 +11922,10 @@ webpack-log@^2.0.0:
     ansi-colors "^3.0.0"
     uuid "^3.3.2"
 
-webpack-sources@^1.1.0, webpack-sources@^1.3.0:
-  version "1.3.0"
-  resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.3.0.tgz#2a28dcb9f1f45fe960d8f1493252b5ee6530fa85"
-  integrity sha512-OiVgSrbGu7NEnEvQJJgdSFPl2qWKkWq5lHMhgiToIiN9w34EBnjYzSYs+VbL5KoYiLNtFFa7BZIKxRED3I32pA==
+webpack-sources@^1.1.0, webpack-sources@^1.3.0, webpack-sources@^1.4.0:
+  version "1.4.3"
+  resolved "https://registry.yarnpkg.com/webpack-sources/-/webpack-sources-1.4.3.tgz#eedd8ec0b928fbf1cbfe994e22d2d890f330a933"
+  integrity sha512-lgTS3Xhv1lCOKo7SA5TjKXMjpSM4sBjNV5+q2bqesbSPs5FjGmU6jjtBSkX9b4qW87vDIsCIlUPOEhbZrMdjeQ==
   dependencies:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
