Update php-http/psr7-integration-tests requirement from ^1.4 to ^1.5

Updates the requirements on [php-http/psr7-integration-tests](https://github.com/php-http/psr7-integration-tests) to permit the latest version.
- [Release notes](https://github.com/php-http/psr7-integration-tests/releases)
- [Changelog](https://github.com/php-http/psr7-integration-tests/blob/1.x/CHANGELOG.md)
- [Commits](php-http/psr7-integration-tests@1.4.0...1.5.0)

---
updated-dependencies:
- dependency-name: php-http/psr7-integration-tests
  dependency-version: 1.5.0
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

composer.json

@@ -38,7 +38,7 @@
     "ext-json": "*",
     "adriansuter/php-autoload-override": "^1.5|| ^2.0",
     "http-interop/http-factory-tests": "^1.0 || ^2.0",
-    "php-http/psr7-integration-tests": "^1.4",
+    "php-http/psr7-integration-tests": "^1.5",
     "phpstan/phpstan": "^2.1",
     "phpunit/phpunit": "^9.6 || ^10",
     "squizlabs/php_codesniffer": "^3.13"