chore(deps): update dependency nightwatch to v2

Author: renovate-bot

package.json

@@ -118,7 +118,7 @@
     "minimist": "^1.2.5",
     "mkdirp": "^0.5.1",
     "moment": "^2.24.0",
-    "nightwatch": "^1.7.11",
+    "nightwatch": "^2.0.0",
     "nightwatch-accessibility": "^1.6.0",
     "node-emoji": "^1.8.1",
     "node-resemble-js": "^0.2.0",