Update nyholm/psr7 requirement from ^1.3 to ^1.5

Author: github-actions[bot]

composer.json

@@ -79,7 +79,7 @@
         "ekino/phpstan-banned-code": "^1.0",
         "infection/infection": "^0.26",
         "matthiasnoback/symfony-config-test": "^4.3.0",
-        "nyholm/psr7": "^1.3",
+        "nyholm/psr7": "^1.5",
         "php-http/mock-client": "^1.0",
         "php-parallel-lint/php-parallel-lint": "^1.3",
         "phpbench/phpbench": "^1.2",