fix(deps): bump deepmerge from 4.1.0 to 4.2.2

Bumps [deepmerge](https://github.com/TehShrike/deepmerge) from 4.1.0 to 4.2.2.
- [Release notes](https://github.com/TehShrike/deepmerge/releases)
- [Changelog](https://github.com/TehShrike/deepmerge/blob/master/changelog.md)
- [Commits](TehShrike/deepmerge@v4.1.0...v4.2.2)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

package.json

@@ -19,7 +19,7 @@
   "author": "Brandon Keepers",
   "license": "ISC",
   "dependencies": {
-    "deepmerge": "^4.1.0",
+    "deepmerge": "^4.2.2",
     "js-yaml": "^3.13.1",
     "probot": "9.11.3"
   },