Merge pull request #28 from mezzio/renovate/psr-http-message-2.x

Allow `psr/http-message:^2`

Author: Ocramius

composer.json

@@ -39,7 +39,7 @@
         "laminas/laminas-psr7bridge": "^1.0.0",
         "laminas/laminas-router": "^3.10.0",
         "mezzio/mezzio-router": "^3.14",
-        "psr/http-message": "^1.0.1"
+        "psr/http-message": "^1.0.1 || ^2.0.0"
     },
     "require-dev": {
         "laminas/laminas-coding-standard": "~2.5.0",