Fix LambdaContext property tests, include callbackWaitsForEmptyEventLoop
Fix LambdaContext property tests, include callbackWaitsForEmptyEventLoop

dherault/serverless-offline,dherault/serverless-offline,dherault/serverless-offline,dherault/serverless-offline,dherault/serverless-offline,dherault/serverless-offline,dherault/serverless-offline