chore(package): update webpack to version 4.41.3

Closes #133

Author: greenkeeper[bot]

package.json

@@ -44,7 +44,7 @@
     "tape": "^4.7.0",
     "uglify-js": "^3.0.20",
     "uglifyjs-webpack-plugin": "^1.1.2",
-    "webpack": "^3.0.0"
+    "webpack": "^4.41.3"
   },
   "dependencies": {
     "ansi_up": "^2.0.2",