build(deps): bump joi from 17.6.0 to 18.0.2

Bumps [joi](https://github.com/hapijs/joi) from 17.6.0 to 18.0.2.
- [Commits](hapijs/joi@v17.6.0...v18.0.2)

---
updated-dependencies:
- dependency-name: joi
  dependency-version: 18.0.2
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

package-lock.json

@@ -27,7 +27,7 @@
     "deepmerge": "^4.3.1",
     "escape-string-regexp": "^4.0.0",
     "ignore": "^5.2.0",
-    "joi": "^17.6.0",
+    "joi": "^18.0.2",
     "lodash": "^4.17.23",
     "probot": "^13.0.0",
     "regex-parser": "^2.2.11",