minor #44209 Allow v3 contracts where possible (derrabus)

This PR was merged into the 5.4 branch.

Discussion
----------

Allow v3 contracts where possible

| Q             | A
| ------------- | ---
| Branch?       | 5.4
| Bug fix?      | no
| New feature?  | no
| Deprecations? | no
| Tickets       | N/A
| License       | MIT
| Doc PR        | N/A

Commits
-------

e171a3e51e Allow v3 contracts where possible

Author: nicolas-grekas

composer.json

@@ -21,8 +21,8 @@
         "psr/log": "^1|^2|^3"
     },
     "require-dev": {
-        "symfony/event-dispatcher-contracts": "^2",
-        "symfony/http-client-contracts": "^2",
+        "symfony/event-dispatcher-contracts": "^2|^3",
+        "symfony/http-client-contracts": "^2|^3",
         "symfony/messenger": "^4.4|^5.0|^6.0"
     },
     "conflict": {