Bump phpunit/phpunit from 9.5.5 to 9.5.6 (#4282)

Bumps [phpunit/phpunit](https://github.com/sebastianbergmann/phpunit) from 9.5.5 to 9.5.6.
- [Release notes](https://github.com/sebastianbergmann/phpunit/releases)
- [Changelog](https://github.com/sebastianbergmann/phpunit/blob/master/ChangeLog-9.5.md)
- [Commits](https://github.com/sebastianbergmann/phpunit/compare/9.5.5...9.5.6)

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

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

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

composer.lock

@@ -1496,16 +1496,16 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "9.5.5",
+            "version": "9.5.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "89ff45ea9d70e35522fb6654a2ebc221158de276"
+                "reference": "fb9b8333f14e3dce976a60ef6a7e05c7c7ed8bfb"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/89ff45ea9d70e35522fb6654a2ebc221158de276",
-                "reference": "89ff45ea9d70e35522fb6654a2ebc221158de276",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/fb9b8333f14e3dce976a60ef6a7e05c7c7ed8bfb",
+                "reference": "fb9b8333f14e3dce976a60ef6a7e05c7c7ed8bfb",
                 "shasum": ""
             },
             "require": {
@@ -1535,7 +1535,7 @@
                 "sebastian/global-state": "^5.0.1",
                 "sebastian/object-enumerator": "^4.0.3",
                 "sebastian/resource-operations": "^3.0.3",
-                "sebastian/type": "^2.3.2",
+                "sebastian/type": "^2.3.4",
                 "sebastian/version": "^3.0.2"
             },
             "require-dev": {
@@ -1583,7 +1583,7 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.5"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/9.5.6"
             },
             "funding": [
                 {
@@ -1595,7 +1595,7 @@
                     "type": "github"
                 }
             ],
-            "time": "2021-06-05T04:49:07+00:00"
+            "time": "2021-06-23T05:14:38+00:00"
         },
         {
             "name": "sebastian/cli-parser",