chore(package.json): Use electron 1.7.7

package.json

@@ -35,6 +35,7 @@
   "devDependencies": {
     "electron": "1.7.5",
     "electron-packager": "*",
+    "electron": "1.7.7",
     "electron-rebuild": "^1.5.6",
     "eslint": ">=3",
     "eslint-plugin-jsdoc": "*",