Bump the minor-composer-dependencies group with 6 updates

Bumps the minor-composer-dependencies group with 6 updates:

| Package | From | To |
| --- | --- | --- |
| drupal/config_ignore | `2.3.0` | `2.4.0` |
| drupal/openapi | `2.0.0` | `2.1.0` |
| drupal/purge | `3.2.0` | `3.4.0` |
| drupal/varnish_purge | `2.1.0` | `2.2.0` |
| [php-mock/php-mock](https://github.com/php-mock/php-mock) | `2.3.0` | `2.4.1` |
| [phpspec/prophecy-phpunit](https://github.com/phpspec/prophecy-phpunit) | `2.0.1` | `2.0.2` |


Updates `drupal/config_ignore` from 2.3.0 to 2.4.0

Updates `drupal/openapi` from 2.0.0 to 2.1.0

Updates `drupal/purge` from 3.2.0 to 3.4.0

Updates `drupal/varnish_purge` from 2.1.0 to 2.2.0

Updates `php-mock/php-mock` from 2.3.0 to 2.4.1
- [Release notes](https://github.com/php-mock/php-mock/releases)
- [Commits](php-mock/php-mock@2.3.0...2.4.1)

Updates `phpspec/prophecy-phpunit` from 2.0.1 to 2.0.2
- [Release notes](https://github.com/phpspec/prophecy-phpunit/releases)
- [Changelog](https://github.com/phpspec/prophecy-phpunit/blob/master/CHANGES.md)
- [Commits](phpspec/prophecy-phpunit@v2.0.1...v2.0.2)

---
updated-dependencies:
- dependency-name: drupal/config_ignore
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-composer-dependencies
- dependency-name: drupal/openapi
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-composer-dependencies
- dependency-name: drupal/purge
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-composer-dependencies
- dependency-name: drupal/varnish_purge
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: minor-composer-dependencies
- dependency-name: php-mock/php-mock
  dependency-type: direct:development
  update-type: version-update:semver-minor
  dependency-group: minor-composer-dependencies
- dependency-name: phpspec/prophecy-phpunit
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: minor-composer-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>