Updated dependencies to get latest webpack

Author: hildjj

package.json

@@ -75,13 +75,14 @@
     "toc": "doctoc --title '## Table of Contents' README.md && doctoc --title '## Table of Contents' CONTRIBUTING.md"
   },
   "devDependencies": {
-    "doctoc": "^0.15.0",
+    "doctoc": "^1.3.1",
     "eslint": "^4.19.1",
     "live-server": "^1.2.0",
     "npm-run-all": "^4.1.2",
     "nyc": "^11.7.1",
     "watch": "^1.0.2",
-    "webpack": "^3.10"
+    "webpack": "^4.9.1",
+    "webpack-cli": "^2.1.4"
   },
   "nyc": {
     "reporter": "html"

webpack.config.js

@@ -5,6 +5,7 @@ module.exports = [
   // Web build.
   {
     entry: "./source-map.js",
+    mode: "production",
     output: {
       path: distDir,
       filename: "source-map.js",