Merge pull request #13 from sunaoka/feature/async-aws/ssm-2.x

Add support async-aws/ssm 2.x

Author: mnapoli

composer.json

@@ -16,7 +16,7 @@
     },
     "require": {
         "php": ">=8.0",
-        "async-aws/ssm": "^1.3"
+        "async-aws/ssm": "^1.3 || ^2.0"
     },
     "require-dev": {
         "phpunit/phpunit": "^9.6.10",