Merge pull request #60 from GitSquared/greenkeeper/electron-builder-20.0.4

Update electron-builder to the latest version 🚀

package.json

@@ -84,7 +84,7 @@
   "devDependencies": {
     "clean-css": "4.1.9",
     "electron": "1.8.2",
-    "electron-builder": "19.56.0",
+    "electron-builder": "20.0.4",
     "electron-rebuild": "1.7.3",
     "node-json-minify": "1.0.0",
     "uglify-es": "3.3.10"