Updated CloudFormation template to use Node 8.1 runtime

Author: justonian

Auth/2_ServerlessAPI/ServerlessBackend.yaml

@@ -55,7 +55,7 @@ Resources:
     Type: AWS::Lambda::Function
     Properties:
       FunctionName: RequestUnicorn
-      Runtime: nodejs6.10
+      Runtime: nodejs8.10
       Role: !GetAtt RequestUnicornExecutionRole.Arn
       Timeout: 5
       MemorySize: 128