Greenkeeper/electron builder 19.54.0 (#49)

* chore(package): update electron-builder to version 19.54.0

Closes #46

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: GitSquared

package-lock.json

@@ -84,7 +84,7 @@
   "devDependencies": {
     "clean-css": "4.1.9",
     "electron": "1.7.10",
-    "electron-builder": "19.52.1",
+    "electron-builder": "19.54.0",
     "electron-rebuild": "1.7.3",
     "node-json-minify": "1.0.0",
     "uglify-es": "3.3.7"