Allow psr/cache v2

Author: nicolas-grekas

composer.json

@@ -41,7 +41,7 @@
         "symfony/templating": "^3.4|^4.0|^5.0",
         "symfony/translation": "^4.2|^5.0",
         "symfony/translation-contracts": "^1.1|^2",
-        "psr/cache": "~1.0",
+        "psr/cache": "^1.0|^2.0",
         "twig/twig": "^1.43|^2.13|^3.0.4"
     },
     "provide": {