Bump shelljs from 0.7.7 to 0.8.3

Bumps [shelljs](https://github.com/shelljs/shelljs) from 0.7.7 to 0.8.3.
- [Release notes](https://github.com/shelljs/shelljs/releases)
- [Changelog](https://github.com/shelljs/shelljs/blob/master/CHANGELOG.md)
- [Commits](https://github.com/shelljs/shelljs/compare/v0.7.7...v0.8.3)

package.json

@@ -35,7 +35,7 @@
     "raven-js": "3.27.1",
     "raw-loader": "0.5.1",
     "sass-loader": "^7.0.1",
-    "shelljs": "0.7.7",
+    "shelljs": "0.8.3",
     "source-code-pro": "^2.30.1",
     "source-sans-pro": "2.0.10",
     "style-loader": "^0.23.1",

yarn.lock

@@ -2546,18 +2546,7 @@ glob@^6.0.4:
     once "^1.3.0"
     path-is-absolute "^1.0.0"
 
-glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.1.1, glob@^7.1.2, glob@~7.1.1, glob@~7.1.2:
-  version "7.1.3"
-  resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.3.tgz#3960832d3f1574108342dafd3a67b332c0969df1"
-  dependencies:
-    fs.realpath "^1.0.0"
-    inflight "^1.0.4"
-    inherits "2"
-    minimatch "^3.0.4"
-    once "^1.3.0"
-    path-is-absolute "^1.0.0"
-
-glob@^7.1.3:
+glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.1.1, glob@^7.1.2, glob@^7.1.3, glob@~7.1.1, glob@~7.1.2:
   version "7.1.4"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.4.tgz#aa608a2f6c577ad357e1ae5a5c26d9a8d1969255"
   dependencies:
@@ -5736,17 +5725,10 @@ shebang-regex@^1.0.0:
   version "1.0.0"
   resolved "https://registry.yarnpkg.com/shebang-regex/-/shebang-regex-1.0.0.tgz#da42f49740c0b42db2ca9728571cb190c98efea3"
 
-shelljs@0.7.7:
-  version "0.7.7"
-  resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.7.7.tgz#b2f5c77ef97148f4b4f6e22682e10bba8667cff1"
-  dependencies:
-    glob "^7.0.0"
-    interpret "^1.0.0"
-    rechoir "^0.6.2"
-
-shelljs@^0.8.2:
+shelljs@0.8.3, shelljs@^0.8.2:
   version "0.8.3"
   resolved "https://registry.yarnpkg.com/shelljs/-/shelljs-0.8.3.tgz#a7f3319520ebf09ee81275b2368adb286659b097"
+  integrity sha512-fc0BKlAWiLpwZljmOvAOTE/gXawtCoNrP5oaY7KIaQbbyHeQVg01pSEuEGvGh3HEdBU4baCD7wQBwADmM/7f7A==
   dependencies:
     glob "^7.0.0"
     interpret "^1.0.0"