chore(package): update electron to version 7.1.7

Closes #13

Author: greenkeeper[bot]

package.json

@@ -20,7 +20,7 @@
   },
   "devDependencies": {
     "cz-conventional-changelog": "^2.0.0",
-    "electron": "^1.6.10",
+    "electron": "^7.1.7",
     "eslint": "^3.19.0",
     "eslint-config-lludol": "^0.1.6"
   },