Allow v3 contracts where possible

Author: derrabus

composer.json

@@ -18,7 +18,7 @@
     "require": {
         "php": ">=7.2.5",
         "symfony/cache": "^4.4|^5.0|^6.0",
-        "symfony/service-contracts": "^1.1|^2"
+        "symfony/service-contracts": "^1.1|^2|^3"
     },
     "autoload": {
         "psr-4": { "Symfony\\Component\\ExpressionLanguage\\": "" },