[Typescript/fetch] Can't use colon in query parameter name

[ChrisJamesC]

Description

If a query parameter contains a colon, the generated code is broken since they are interpreted as type information by the typescript compiler.

Swagger-codegen version

2.2.1 - This is not a regression

Swagger declaration file content or url

{
  "swaggerVersion": "1.2",
  "basePath": "http://localhost:8000/greetings",
  "apis": [
    {
      "path": "/hello/{subject:main}",
      "operations": [
        {
          "method": "GET",
          "type": "string",
          "parameters": [
            {
              "name": "subject:main",
              "type": "string",
              "paramType": "path"
            }
          ]
        }
      ]
    }
  ],
  "models": {}
}

Command line used for generation

swagger-codegen generate -i hello.json -l typescript-fetch -o generated

Steps to reproduce

Grep for subject:main in the generated code.

Suggest a Fix

• escape all usage of the dot notation to refer to parameters in api.mustache. So replacing params.{{paramName}} by params["{{paramName}}"]
• Also replace the param names when they are referred to as interface keys: {paramName: xxx} becomes {"paramName": xxx}