plugin not working as expected after update depedencies

Describe the bug I'm using serverless-appsync-simulator with serverless-offline and serverless-appsync-plugin to simulate appsync(graphql) in local env

but after updated serverless-offline from v7.0.0 to the latest version(because I upgrade nodejs version from 14.x->18.x and the old version of serverless-offline not support it), the simulator not working anymore, all the response is null and sometimes cause an error

To Reproduce

run sls offline start --host 0.0.0.0
go to GraphiQL screen
make a request

Expected behavior It can work normally

Screenshots

Additional context Sample Code

file: serverless.yml

frameworkVersion: '3'
service: my-service

provider:
  runtime: nodejs18.x
  stage: dev

functions:
  main:
    handler: handler.main

appSync:
  name: Appsync
  authenticationType: API_KEY
  lambdaAuthorizerConfig:
      functionName: appsync-auth
  schema: ${file(./conf/schema.yml)}
  dataSources:
    - type: AWS_LAMBDA
          name: main
          description: 'Lambda DataSource'
          config:
            functionName: main
            iamRoleStatements:
              - Effect: "Allow"
                Action:
                  - "lambda:invokeFunction"
                Resource:
                  - "*"
  defaultMappingTemplates:
      request: false
      response: false
   mappingTemplates:
      - dataSource: main
        type: Query
        field: getData

appsync-simulator:
    watch: false
    port: 3000
    apiKey: da2-fakeApiId123456

plugins:
  - serverless-layers
  - serverless-appsync-plugin
  - serverless-appsync-simulator
  - serverless-offline
  - serverless-offline-direct-lambda
  - serverless-step-functions

file: handler.js

'use strict'

const { stringify } = JSON

exports.main = async function main() {
          callback(null, await controller.getData(event.arguments.request, event.info.selectionSetList));
}

file: controller

getData(request) {
result = # process request...
return { data: result };
}

file: data.graphql
```
type Query {
getData(id:Int!):Data
}
```

type Data { id:Int name:String type:String created_at:AWSDateTime deleted:Boolean updated_at:AWSDateTime }



**Environment**

- `serverless`: v3.31.0
- `serverless-offline`: v12.0.4
- `serverless-appsync-simulator`: v0.20.0
- `node.js` version: nodejs18.x
- `OS`: macOS monterey 12.6.5

serverless-appsync / serverless-appsync-simulator

plugin not working as expected after update depedencies #186