Bump flat and nightwatch

Bumps [flat](https://github.com/hughsk/flat) to 5.0.2 and updates ancestor dependency [nightwatch](https://github.com/nightwatchjs/nightwatch). These dependencies need to be updated together.


Updates `flat` from 4.1.1 to 5.0.2
- [Release notes](https://github.com/hughsk/flat/releases)
- [Commits](hughsk/flat@4.1.1...5.0.2)

Updates `nightwatch` from 1.7.13 to 1.7.13
- [Release notes](https://github.com/nightwatchjs/nightwatch/releases)
- [Commits](nightwatchjs/nightwatch@v1.7.13...v1.7.13)

---
updated-dependencies:
- dependency-name: flat
  dependency-type: indirect
- dependency-name: nightwatch
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <[email protected]>

package.json

@@ -105,7 +105,7 @@
     "mini-css-extract-plugin": "1.6.0",
     "mocha": "^10.2.0",
     "msw": "^1.2.1",
-    "nightwatch": "^1.0.19",
+    "nightwatch": "^1.7.13",
     "prettier": "2.1.2",
     "react-axe": "^3.3.0",
     "redux-mock-store": "^1.5.4",