chore: bump nightwatch dependency to 1.x (#3388)

Author: darrenjennings

packages/@vue/cli-plugin-e2e-nightwatch/package.json

@@ -27,7 +27,7 @@
     "chromedriver": "^2.46.0",
     "deepmerge": "^3.2.0",
     "execa": "^1.0.0",
-    "nightwatch": "^0.9.21",
+    "nightwatch": "^1.0.18",
     "selenium-server": "^3.141.59"
   }
 }