Greenkeeper/electron rebuild 1.7.3 (#48)

* chore(package): update electron-rebuild to version 1.7.3

Closes #45

* chore(package): update lockfile

https://npm.im/greenkeeper-lockfile

Author: GitSquared

package-lock.json

@@ -85,7 +85,7 @@
     "clean-css": "4.1.9",
     "electron": "1.7.10",
     "electron-builder": "19.52.1",
-    "electron-rebuild": "1.6.0",
+    "electron-rebuild": "1.7.3",
     "node-json-minify": "1.0.0",
     "uglify-es": "3.3.7"
   }