Use "composer/package-versions-deprecated" when possible

Author: nicolas-grekas

composer.json

@@ -24,6 +24,7 @@
         "symfony/service-contracts": "^1.1|^2"
     },
     "require-dev": {
+        "composer/package-versions-deprecated": "^1.8",
         "symfony/stopwatch": "^3.4|^4.0|^5.0",
         "symfony/config": "^4.2|^5.0",
         "symfony/dependency-injection": "^3.4|^4.0|^5.0",