Upgrade electron to version 7

Author: alexdevero

package.json

@@ -43,7 +43,7 @@
     "postpackage": "electron-packager ./ --out=./builds"
   },
   "dependencies": {
-    "electron": "^6.1.5",
+    "electron": "^7.1.3",
     "react": "^16.12.0",
     "react-dom": "^16.12.0"
   },