Bump posthtml-extend from 0.6.0 to 0.6.2

Bumps [posthtml-extend](https://github.com/posthtml/posthtml-extend) from 0.6.0 to 0.6.2.
- [Release notes](https://github.com/posthtml/posthtml-extend/releases)
- [Changelog](https://github.com/posthtml/posthtml-extend/blob/master/changelog.md)
- [Commits](posthtml/posthtml-extend@v0.6.0...v0.6.2)

---
updated-dependencies:
- dependency-name: posthtml-extend
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

package-lock.json

@@ -27,7 +27,7 @@
     "parcel-bundler": "^1.12.5",
     "postcss": "^8.4.4",
     "postcss-preset-env": "^6.7.0",
-    "posthtml-extend": "^0.6.0",
+    "posthtml-extend": "^0.6.2",
     "prettier": "^2.5.0",
     "quill": "^1.3.6",
     "react": "^17.0.2",