Update Electron to 1.2.1

package.json

@@ -38,7 +38,7 @@
     "electron-builder": "3.20.0",
     "electron-connect": "^0.3.7",
     "electron-packager": "^7.0.1",
-    "electron-prebuilt": "1.0.2",
+    "electron-prebuilt": "1.2.1",
     "electron-squirrel-startup": "^1.0.0",
     "electron-winstaller": "^2.2.0",
     "esformatter": "^0.9.3",
@@ -51,7 +51,7 @@
     "json-loader": "^0.5.4",
     "mocha": "^2.3.4",
     "mocha-circleci-reporter": "0.0.1",
-    "spectron": "~3.0.0",
+    "spectron": "~3.2.0",
     "rimraf": "^2.5.2",
     "style-loader": "^0.13.0",
     "through2": "^2.0.1",