diff --git a/package-lock.json b/package-lock.json
index c9fb84d..dc23e89 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1320,16 +1320,16 @@
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       "resolved": "https://registry.npmjs.org/compression/-/compression-1.7.0.tgz",
-      "integrity": "sha1-AwyfGY8WQ6BX13anOOki2kNzAS0=",
+      "integrity": "sha512-EzpIPZX++rTQylMht3iaYigq2NNJbI/e9VaDzR8sLi8vgOCHpvLT93GuvsGYW2ANEd14Ax2nI1Ydi9L5ykGeig==",
       "dev": true,
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.3",
         "bytes": "2.5.0",
-        "compressible": "2.0.11",
+        "compressible": "~2.0.10",
         "debug": "2.6.8",
-        "on-headers": "1.0.1",
+        "on-headers": "~1.0.1",
         "safe-buffer": "5.1.1",
-        "vary": "1.1.1"
+        "vary": "~1.1.1"
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@@ -1504,7 +1504,7 @@
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       "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.8.tgz",
-      "integrity": "sha1-5zFTHKLt4n0YgiJCfaF4IdaP9Pw=",
+      "integrity": "sha512-E22fsyWPt/lr4/UgQLt/pXqerGMDsanhbnmqIS3VAXuDi1v3IpiwXe2oncEIondHSBuPDWRoK/pMjlvi8FuOXQ==",
       "dev": true,
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@@ -1899,49 +1899,49 @@
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       "resolved": "https://registry.npmjs.org/express/-/express-4.15.3.tgz",
-      "integrity": "sha1-urZdDwOqgMNYQIly/HAPkWlEtmI=",
+      "integrity": "sha512-eyQPXY6coAN6NpdZhXZsAvoGSvWZtYq1S6YCBA86+RTwzzecvLvgPR/Jm+MR0otFUzLnmI/lfv79aoIMDpWW8w==",
       "dev": true,
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.3",
         "array-flatten": "1.1.1",
         "content-disposition": "0.5.2",
-        "content-type": "1.0.2",
+        "content-type": "~1.0.2",
         "cookie": "0.3.1",
         "cookie-signature": "1.0.6",
         "debug": "2.6.7",
-        "depd": "1.1.1",
-        "encodeurl": "1.0.1",
-        "escape-html": "1.0.3",
-        "etag": "1.8.0",
-        "finalhandler": "1.0.4",
+        "depd": "~1.1.0",
+        "encodeurl": "~1.0.1",
+        "escape-html": "~1.0.3",
+        "etag": "~1.8.0",
+        "finalhandler": "~1.0.3",
         "fresh": "0.5.0",
         "merge-descriptors": "1.0.1",
-        "methods": "1.1.2",
-        "on-finished": "2.3.0",
-        "parseurl": "1.3.1",
+        "methods": "~1.1.2",
+        "on-finished": "~2.3.0",
+        "parseurl": "~1.3.1",
         "path-to-regexp": "0.1.7",
-        "proxy-addr": "1.1.5",
+        "proxy-addr": "~1.1.4",
         "qs": "6.4.0",
-        "range-parser": "1.2.0",
+        "range-parser": "~1.2.0",
         "send": "0.15.3",
         "serve-static": "1.12.3",
         "setprototypeof": "1.0.3",
-        "statuses": "1.3.1",
-        "type-is": "1.6.15",
+        "statuses": "~1.3.1",
+        "type-is": "~1.6.15",
         "utils-merge": "1.0.0",
-        "vary": "1.1.1"
+        "vary": "~1.1.1"
       },
       "dependencies": {
         "array-flatten": {
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           "resolved": "https://registry.npmjs.org/array-flatten/-/array-flatten-1.1.1.tgz",
-          "integrity": "sha1-ml9pkFGx5wczKPKgCJaLZOopVdI=",
+          "integrity": "sha512-PCVAQswWemu6UdxsDFFX/+gVeYqKAod3D3UVm91jHwynguOwAvYPhx8nNlM++NqRcK6CxxpUafjmhIdKiHibqg==",
           "dev": true
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         "debug": {
           "version": "2.6.7",
           "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.7.tgz",
-          "integrity": "sha1-krrR9tBbu2u6Isyoi80OyJTChh4=",
+          "integrity": "sha512-7YoSmTDGnXYkFJOvaYXfxcvNE25Y11uZ0X8Mo+pSXjHz/9WUlbCS4O6q+wj7lhubdNQQXxxsSOnlqlDG8SenXQ==",
           "dev": true,
           "requires": {
             "ms": "2.0.0"
@@ -3789,7 +3789,7 @@
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           "resolved": "https://registry.npmjs.org/debug/-/debug-2.6.7.tgz",
-          "integrity": "sha1-krrR9tBbu2u6Isyoi80OyJTChh4=",
+          "integrity": "sha512-7YoSmTDGnXYkFJOvaYXfxcvNE25Y11uZ0X8Mo+pSXjHz/9WUlbCS4O6q+wj7lhubdNQQXxxsSOnlqlDG8SenXQ==",
           "dev": true,
           "requires": {
             "ms": "2.0.0"
@@ -3800,16 +3800,16 @@
     "serve-index": {
       "version": "1.9.0",
       "resolved": "https://registry.npmjs.org/serve-index/-/serve-index-1.9.0.tgz",
-      "integrity": "sha1-0rKA/FYNYW7oG0i/D6gqvtJIXOc=",
+      "integrity": "sha512-btXPFKITJiodQ9CaH6RrvVFMNAT8TcYz5DHpXdtY/7rpG5EXUV5Bw8Pu8GVUzCHlkEXOhEOLntXLzMhirMsBXw==",
       "dev": true,
       "requires": {
-        "accepts": "1.3.3",
+        "accepts": "~1.3.3",
         "batch": "0.6.1",
         "debug": "2.6.8",
-        "escape-html": "1.0.3",
-        "http-errors": "1.6.1",
-        "mime-types": "2.1.16",
-        "parseurl": "1.3.1"
+        "escape-html": "~1.0.3",
+        "http-errors": "~1.6.1",
+        "mime-types": "~2.1.15",
+        "parseurl": "~1.3.1"
       }
     },
     "serve-static": {
@@ -4019,15 +4019,6 @@
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       }
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-    "string_decoder": {
-      "version": "1.0.3",
-      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
-      "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "5.1.1"
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     "string-width": {
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       "resolved": "https://registry.npmjs.org/string-width/-/string-width-1.0.2.tgz",
@@ -4039,6 +4030,15 @@
         "strip-ansi": "3.0.1"
       }
     },
+    "string_decoder": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/string_decoder/-/string_decoder-1.0.3.tgz",
+      "integrity": "sha512-4AH6Z5fzNNBcH+6XDMfA/BTt87skxqJlO0lAh3Dker5zThcAxG6mKz+iGu308UKoPPQ8Dcqx/4JhujzltRa+hQ==",
+      "dev": true,
+      "requires": {
+        "safe-buffer": "5.1.1"
+      }
+    },
     "strip-ansi": {
       "version": "3.0.1",
       "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",