Update electron-builder to the latest version 🚀 (#52)

* chore(package): update electron-builder to version 19.55.2

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: greenkeeper[bot]

package-lock.json

@@ -84,7 +84,7 @@
   "devDependencies": {
     "clean-css": "4.1.9",
     "electron": "1.7.11",
-    "electron-builder": "19.54.0",
+    "electron-builder": "19.55.2",
     "electron-rebuild": "1.7.3",
     "node-json-minify": "1.0.0",
     "uglify-es": "3.3.8"