follow mocha convention

Author: zeke

package.json

@@ -9,7 +9,7 @@
     "start": "electron .",
     "dev": "electron . --debug",
     "lint": "standard | snazzy",
-    "test": "mocha tests && npm run lint",
+    "test": "mocha && npm run lint",
     "package": "npm-run-all package:*",
     "package:mac": "electron-packager . --overwrite --platform=darwin --arch=x64 --out=out --icon=assets/app-icon/mac/app.icns --osx-sign.identity='Developer ID Application: GitHub' --extend-info=assets/mac/info.plist",
     "package:win": "electron-packager . --overwrite --platform=win32 --arch=ia32 --out=out --icon=assets/app-icon/win/app.ico",