refactor: update psr/container-implementation version constraint to ^1.0

Author: butschster

composer.json

@@ -19,7 +19,7 @@
     "php-mcp/schema": "^1.0",
     "psr/clock": "^1.0",
     "psr/container": "^1.0 || ^2.0",
-    "psr/container-implementation": "*",
+    "psr/container-implementation": "^1.0",
     "psr/log": "^1.0 || ^2.0 || ^3.0",
     "psr/http-server-middleware": "^1.0 || ^2.0 || ^3.0",
     "psr/simple-cache": "^1.0 || ^2.0 || ^3.0",