chore(tests): add CI for checking lowest version of dependencies (#6899)

Author: bshaffer

composer.json

@@ -12,7 +12,8 @@
         "phpunit/phpunit": "^9.0",
         "phpspec/prophecy-phpunit": "^2.0",
         "squizlabs/php_codesniffer": "2.*",
-        "phpdocumentor/reflection": "^5.0",
+        "phpdocumentor/reflection": "^5.3.3",
+        "phpdocumentor/reflection-docblock": "^5.3",
         "erusev/parsedown": "^1.6",
         "flix-tech/avro-php": "^5.0.0"
     },