[PHP]: Update phpstan/phpstan-doctrine requirement from 1.3.59 to 1.3.60

Updates the requirements on [phpstan/phpstan-doctrine](https://github.com/phpstan/phpstan-doctrine) to permit the latest version.
- [Release notes](https://github.com/phpstan/phpstan-doctrine/releases)
- [Commits](phpstan/phpstan-doctrine@1.3.59...1.3.60)

---
updated-dependencies:
- dependency-name: phpstan/phpstan-doctrine
  dependency-type: direct:development
...

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

composer.json

@@ -32,7 +32,7 @@
         "ext-ast": "*",
         "bamarni/composer-bin-plugin": "^1.4",
         "phpstan/phpstan": "^1.5.6",
-        "phpstan/phpstan-doctrine": "1.3.59",
+        "phpstan/phpstan-doctrine": "1.3.60",
         "phpstan/phpstan-phpunit": "1.3.15",
         "phpstan/phpstan-symfony": "1.3.7",
         "rector/rector": "1.0.0",