Add implementations declaration

Author: devanych

composer.json

@@ -21,7 +21,6 @@
     "require": {
         "php": "^7.4|^8.0",
         "httpsoft/http-response": "^1.0",
-        "psr/http-message": "^1.0",
         "psr/http-server-handler": "^1.0",
         "psr/http-server-middleware": "^1.0"
     },
@@ -31,6 +30,11 @@
         "squizlabs/php_codesniffer": "^3.5",
         "vimeo/psalm": "^3.14"
     },
+    "provide": {
+        "psr/http-message-implementation": "1.0",
+        "psr/http-server-handler-implementation": "1.0",
+        "psr/http-server-middleware-implementation": "1.0"
+    },
     "autoload": {
         "psr-4": {
             "HttpSoft\\ErrorHandler\\": "src/"