chore(deps): update dependency webpack to v4.9.0

Author: renovate-bot

package.json

@@ -83,7 +83,7 @@
         "react-router-dom": "4.2.2",
         "rimraf": "2.6.2",
         "styled-components": "3.2.6",
-        "webpack": "4.8.3",
+        "webpack": "4.9.0",
         "webpack-cli": "2.1.4",
         "webpack-dev-server": "3.1.4"
     }

yarn.lock

@@ -5186,7 +5186,7 @@ json-buffer@3.0.0:
   version "3.0.0"
   resolved "https://registry.yarnpkg.com/json-buffer/-/json-buffer-3.0.0.tgz#5b1f397afc75d677bde8bcfc0e47e1f9a3d9a898"
 
-json-parse-better-errors@^1.0.1:
+json-parse-better-errors@^1.0.1, json-parse-better-errors@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/json-parse-better-errors/-/json-parse-better-errors-1.0.2.tgz#bb867cfb3450e69107c131d1c514bab3dc8bcaa9"
 
@@ -8689,9 +8689,9 @@ webpack-sources@^1.0.1, webpack-sources@^1.1.0:
     source-list-map "^2.0.0"
     source-map "~0.6.1"
 
-webpack@4.8.3:
-  version "4.8.3"
-  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.8.3.tgz#957c8e80000f9e5cc03d775e78b472d8954f4eeb"
+webpack@4.9.0:
+  version "4.9.0"
+  resolved "https://registry.yarnpkg.com/webpack/-/webpack-4.9.0.tgz#a795fd0fad72205faa46bdca09ffaa36f4446262"
   dependencies:
     "@webassemblyjs/ast" "1.4.3"
     "@webassemblyjs/wasm-edit" "1.4.3"
@@ -8703,6 +8703,7 @@ webpack@4.8.3:
     chrome-trace-event "^0.1.1"
     enhanced-resolve "^4.0.0"
     eslint-scope "^3.7.1"
+    json-parse-better-errors "^1.0.2"
     loader-runner "^2.3.0"
     loader-utils "^1.1.0"
     memory-fs "~0.4.1"