Update nikic/php-parser requirement from ^4.10 to ^5.2

Updates the requirements on [nikic/php-parser](https://github.com/nikic/PHP-Parser) to permit the latest version.
- [Release notes](https://github.com/nikic/PHP-Parser/releases)
- [Changelog](https://github.com/nikic/PHP-Parser/blob/master/CHANGELOG.md)
- [Commits](nikic/PHP-Parser@v4.10.0...v5.2.0)

---
updated-dependencies:
- dependency-name: nikic/php-parser
  dependency-type: direct:production
...

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

composer.json

@@ -32,7 +32,7 @@
         "ext-curl": "*",
         "ext-openssl": "*",
         "knplabs/github-api": "^3.2",
-        "nikic/php-parser": "^4.10",
+        "nikic/php-parser": "^5.2",
         "nyholm/psr7": "^1.4.0",
         "php-http/guzzle7-adapter": "^1.0",
         "squizlabs/php_codesniffer": "^3.6",