add another check if v2.

Author: xinghengwang

lib/index.js

@@ -368,6 +368,10 @@ function determineIsEventVersionV1(event) {
   if (event.version === '1.0') {
     return true;
   }
+
+  if (event.version === '2.0') {
+    return false;
+  }
   // per aws event spec https://docs.aws.amazon.com/apigateway/latest/developerguide/http-api-develop-integrations-lambda.html
   // events suppose to have version specified.
   // For some reason, the version is not specified in some cases.