Update build tools.

Build artefacts did not change...

Author: ryanelian

package.json

@@ -16,10 +16,10 @@
     "build": "webpack && webpack --config webpack.config.min.js"
   },
   "devDependencies": {
-    "ts-loader": "^4.2.0",
+    "ts-loader": "^4.3.0",
     "typescript": "^2.8.3",
-    "webpack": "^4.6.0",
-    "webpack-cli": "^2.0.15"
+    "webpack": "^4.8.1",
+    "webpack-cli": "^2.1.3"
   },
   "dependencies": {}
 }