Bump markdownlint-cli from 0.21.0 to 0.22.0 (#42)

Bumps [markdownlint-cli](https://github.com/igorshubovych/markdownlint-cli) from 0.21.0 to 0.22.0.
- [Release notes](https://github.com/igorshubovych/markdownlint-cli/releases)
- [Commits](igorshubovych/markdownlint-cli@v0.21.0...v0.22.0)

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

package.json

@@ -46,7 +46,7 @@
     "chai": "^4.2.0",
     "dockerlint": "^0.3.9",
     "eslint": "^6.8.0",
-    "markdownlint-cli": "^0.21.0",
+    "markdownlint-cli": "^0.22.0",
     "mocha": "^7.0.1",
     "nock": "^11.7.2",
     "npm-run-all": "^4.1.5",