Update to make the CLI aware of Java21 support (#265)

Author: meiao

README.md

@@ -37,6 +37,7 @@ A CLI to install the New Relic AWS Lambda integration and layers.
 * java8.al2
 * java11
 * java17
+* java21
 * nodejs16.x
 * nodejs18.x
 * nodejs20.x

newrelic_lambda_cli/utils.py

@@ -10,6 +10,10 @@
 NEW_RELIC_ARN_PREFIX_TEMPLATE = "arn:aws:lambda:%s:451483290750"
 RUNTIME_CONFIG = {
     "dotnetcore3.1": {"LambdaExtension": True},
+    "java21": {
+        "Handler": "com.newrelic.java.HandlerWrapper::",
+        "LambdaExtension": True,
+    },
     "java17": {
         "Handler": "com.newrelic.java.HandlerWrapper::",
         "LambdaExtension": True,

tests/test_utils.py

@@ -77,6 +77,7 @@ def test_supports_lambda_extension():
         supports_lambda_extension(runtime)
         for runtime in (
             "dotnetcore3.1",
+            "java21",
             "java17",
             "java11",
             "java8.al2",