Update symfony/phpunit-bridge requirement from ^4.1 || ^5.0 || ^5.2 |…

…| ^6.0 to ^7.0.2 (#62)

Updates the requirements on [symfony/phpunit-bridge](https://github.com/symfony/phpunit-bridge) to permit the latest version.
- [Release notes](https://github.com/symfony/phpunit-bridge/releases)
- [Changelog](https://github.com/symfony/phpunit-bridge/blob/6.3/CHANGELOG.md)
- [Commits](https://github.com/symfony/phpunit-bridge/commits/v7.0.2)

---
updated-dependencies:
- dependency-name: symfony/phpunit-bridge
  dependency-type: direct:development
...

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

composer.json

@@ -29,7 +29,7 @@
     "tinymce/tinymce":                     "^4 || >=5.1.0"
   },
   "require-dev" : {
-    "symfony/phpunit-bridge": "^4.1 || ^5.0 || ^5.2 || ^6.0",
+    "symfony/phpunit-bridge": "^7.0.2",
     "matthiasnoback/symfony-config-test":  "^4.0",
     "matthiasnoback/symfony-dependency-injection-test": "^4.1"
   },