Add webpack dependencies, update to webpack 4

package.json

@@ -12,6 +12,7 @@
     "@types/jsdom": "11.0.1",
     "@types/mocha": "^2.2.33",
     "@types/node": "6.0.108",
+    "@types/webpack": "^4.4.11",
     "browserify": "^13.3.0",
     "chai": "3.5.0",
     "concurrently": "^3.5.1",
@@ -36,12 +37,14 @@
     "nyc": "^11.8.0",
     "sorcery": "^0.10.0",
     "source-map-loader": "^0.2.3",
+    "ts-loader": "^4.5.0",
     "tslint": "^5.9.1",
     "tslint-consistent-codestyle": "^1.13.0",
     "typescript": "2.8.3",
     "vinyl-buffer": "^1.0.0",
     "vinyl-source-stream": "^1.1.0",
-    "webpack": "^3.10.0",
+    "webpack": "^4.17.1",
+    "webpack-cli": "^3.1.0",
     "webpack-stream": "^4.0.0",
     "zmodem.js": "^0.1.5"
   },