Bump guzzlehttp/psr7 from 1.9.1 to 2.5.0

Bumps [guzzlehttp/psr7](https://github.com/guzzle/psr7) from 1.9.1 to 2.5.0.
- [Release notes](https://github.com/guzzle/psr7/releases)
- [Changelog](https://github.com/guzzle/psr7/blob/2.5/CHANGELOG.md)
- [Commits](https://github.com/guzzle/psr7/compare/1.9.1...2.5.0)

---
updated-dependencies:
- dependency-name: guzzlehttp/psr7
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

composer.json

@@ -71,7 +71,7 @@
         "friendsofsymfony/rest-bundle": "~3.4",
         "friendsofsymfony/user-bundle": "^3.1",
         "guzzlehttp/guzzle": "^5.3.1",
-        "guzzlehttp/psr7": "^1.8",
+        "guzzlehttp/psr7": "^2.5",
         "html2text/html2text": "^4.1",
         "incenteev/composer-parameter-handler": "^2.1",
         "j0k3r/graby": "^2.0",