Indicate compatibility with psr/cache 2 and 3

Author: derrabus

composer.json

@@ -25,7 +25,7 @@
         "ext-json": "*",
         "cebe/php-openapi": "^1.3",
         "league/uri": "^6.3",
-        "psr/cache": "^1.0",
+        "psr/cache": "^1.0 || ^2.0 || ^3.0",
         "psr/http-message": "^1.0",
         "psr/http-server-middleware": "^1.0",
         "respect/validation": "^1.1.3 || ^2.0",