Composer Dev(deps-dev): Bump wp-phpunit/wp-phpunit from 6.6.1 to 6.6.2

Bumps [wp-phpunit/wp-phpunit](https://github.com/wp-phpunit/wp-phpunit) from 6.6.1 to 6.6.2.
- [Commits](wp-phpunit/wp-phpunit@6.6.1...6.6.2)

---
updated-dependencies:
- dependency-name: wp-phpunit/wp-phpunit
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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

composer.json

@@ -45,7 +45,7 @@
     "require-dev": {
         "newfold-labs/wp-php-standards": "^1.2.4",
         "wp-cli/i18n-command": "^2.6.2",
-        "wp-phpunit/wp-phpunit": "^6.6.0"
+        "wp-phpunit/wp-phpunit": "^6.6.2"
     },
     "scripts": {
         "fix": "vendor/bin/phpcbf --standard=phpcs.xml .",