FIX: vulenerable dependency

README.md

@@ -29,7 +29,7 @@ Sits on path: `electron-boilerplate/package.json`. This is where you should decl
 It's also the place to specify the Electron runtime version you want to use:
 ```json
 "devDependencies": {
-  "electron": "1.8.2"
+  "electron": "1.8.4"
 }
 ```
 Note: [Electron authors advise](http://electron.atom.io/docs/tutorial/electron-versioning/) to use fixed version here.

package.json

@@ -38,7 +38,7 @@
   },
   "devDependencies": {
     "chai": "^3.5.0",
-    "electron": "1.8.2",
+    "electron": "1.8.4",
     "electron-builder": "^5.12.1",
     "electron-mocha": "^3.0.0",
     "fs-jetpack": "^0.9.0",