Update wmde/freezable-value-object requirement from ~1.0 to ~2.0

Updates the requirements on [wmde/freezable-value-object](https://github.com/wmde/FreezableValueObject) to permit the latest version.
- [Release notes](https://github.com/wmde/FreezableValueObject/releases)
- [Commits](wmde/FreezableValueObject@1.0.0...v2.0.0)

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

Author: dependabot[bot]

composer.json

@@ -7,7 +7,7 @@
 		"doctrine/dbal": "^2.10",
 		"doctrine/orm": "^2.7",
 		"ramsey/uuid": "^4.0",
-		"wmde/freezable-value-object": "~1.0"
+		"wmde/freezable-value-object": "~2.0"
 	},
 	"require-dev": {
 		"phpunit/phpunit": "~9.2",