chore(package): update webpack to version 4.41.5

Closes #45

Author: greenkeeper[bot]

package.json

@@ -66,7 +66,7 @@
     "stylelint": "~9.1.3",
     "stylelint-config-standard": "~17.0.0",
     "stylelint-processor-styled-components": "~1.3.1",
-    "webpack": "~3.10.0"
+    "webpack": "~4.41.5"
   },
   "dependencies": {
     "loader-utils": "~1.1.0"