Update dependency webpack to v4.30.0

package.json

@@ -72,7 +72,7 @@
     "redux-debounce": "1.0.1",
     "taskcluster-client-web": "8.1.1",
     "taskcluster-lib-scopes": "10.0.2",
-    "webpack": "4.29.6",
+    "webpack": "4.30.0",
     "webpack-cli": "3.3.0"
   },
   "devDependencies": {

yarn.lock

@@ -9915,10 +9915,10 @@ webpack-sources@^1.1.0, webpack-sources@^1.3.0:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
 
-webpack@4.29.6:
-  version "4.29.6"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.29.6.tgz#66bf0ec8beee4d469f8b598d3988ff9d8d90e955"
-  integrity sha512-MwBwpiE1BQpMDkbnUUaW6K8RFZjljJHArC6tWQJoFm0oQtfoSebtg4Y7/QHnJ/SddtjYLHaKGX64CFjG5rehJw==
+webpack@4.30.0:
+  version "4.30.0"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.30.0.tgz#aca76ef75630a22c49fcc235b39b4c57591d33a9"
+  integrity sha512-4hgvO2YbAFUhyTdlR4FNyt2+YaYBYHavyzjCMbZzgglo02rlKi/pcsEzwCuCpsn1ryzIl1cq/u8ArIKu8JBYMg==
   dependencies:
     "@webassemblyjs/ast" "1.8.5"
     "@webassemblyjs/helper-module-context" "1.8.5"