Use Spectron to execute test

package.json

@@ -31,7 +31,6 @@
     "babel-core": "^6.7.5",
     "babel-loader": "^6.2.4",
     "babel-preset-react": "^6.5.0",
-    "chromedriver": "^2.20.0",
     "del": "^2.2.0",
     "electron-builder": "^3.11.0",
     "electron-connect": "^0.3.7",
@@ -48,10 +47,10 @@
     "mocha": "^2.3.4",
     "mocha-circleci-reporter": "0.0.1",
     "should": "^8.0.1",
+    "spectron": "~3.0.0",
     "style-loader": "^0.13.0",
     "through2": "^2.0.1",
     "vinyl-named": "^1.1.0",
-    "webdriverio": "^3.3.0",
     "webpack": "^1.12.15",
     "webpack-stream": "^3.1.0"
   },