Added runtime to e2eUtils

Author: dreamorosi

Diff for: packages/commons/tests/utils/e2eUtils.ts

@@ -14,11 +14,12 @@ import { InvocationLogs } from './InvocationLogs';
 
 const lambdaClient = new AWS.Lambda();
 
-const testRuntimeKeys = [ 'nodejs12x', 'nodejs14x' ];
+const testRuntimeKeys = [ 'nodejs12x', 'nodejs14x', 'nodejs16x' ];
 export type TestRuntimesKey = typeof testRuntimeKeys[number];
 export const TEST_RUNTIMES: Record<TestRuntimesKey, Runtime> = {
   nodejs12x: Runtime.NODEJS_12_X,
   nodejs14x: Runtime.NODEJS_14_X,
+  nodejs16x: Runtime.NODEJS_16_X
 };
 
 export type StackWithLambdaFunctionOptions = {