Merge pull request #445 from shockone/greenkeeper-electron-builder-4.2.0

Update electron-builder to version 4.2.0 🚀

Author: ShockOne

package.json

@@ -38,7 +38,7 @@
   "devDependencies": {
     "chai": "3.5.0",
     "devtron": "1.1.2",
-    "electron-builder": "3.25.0",
+    "electron-builder": "4.2.0",
     "electron-prebuilt": "1.2.1",
     "mocha": "2.5.3",
     "npm-check-updates": "2.6.5",