Bump mkdirp from 1.0.4 to 2.1.5 (#139)

Bumps [mkdirp](https://github.com/isaacs/node-mkdirp) from 1.0.4 to 2.1.5.
- [Release notes](https://github.com/isaacs/node-mkdirp/releases)
- [Changelog](https://github.com/isaacs/node-mkdirp/blob/main/CHANGELOG.md)
- [Commits](isaacs/node-mkdirp@v1.0.4...v2.1.5)

---
updated-dependencies:
- dependency-name: mkdirp
  dependency-type: direct:development
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

package.json

@@ -33,7 +33,7 @@
   },
   "devDependencies": {
     "chai": "^4.0.0",
-    "mkdirp": "^1.0.4",
+    "mkdirp": "^2.1.5",
     "mocha": "^9.0.2",
     "rimraf": "^3.0.2"
   },