AWS API Gateway Mapping Template

## Bug Report

Does serverless offline have support for mapping templates on the Integration Response?
Mapping template works when deployed in AWS but not when using serverless offline.
Can you please assist in checking what is wrong with it?
Full details here https://github.com/enpidev/serverless-offline-mapping-templates

**Current Behavior**
Responses are not being translated

**Sample Code**

https://github.com/enpidev/serverless-offline-mapping-templates

**Expected behavior/code**
Responses should be translated using the mapping templates

**Environment**

- `serverless` version:
Framework Core: 2.45.1
Plugin: 5.3.0
SDK: 4.2.3
Components: 3.11.0
- `serverless-offline` version: v7.0.0
- `node.js` version: v12.22.1
- `OS`: macOS 10.15.7