Add request and response types

[findkim]

Overview

• Uses text/template over html/template to avoid special characters escaping. For example the string value " would escape to "
• Renames BodyType and ReponseType to *Format which describes the format of the request and response
• Adds new input for BodyType and ResponseType to specify the Go type for request and response bodies
  • Default body type for JSON format remains as map[string]interface{}
  • Default response type for JSON format remains as interface{}
• Adds support to specify package imports to reference Go types from different packages

Breaking Changes

The JSON input file format changes from

{
  "<funcName>": {
    // endpoint info
    // ...
    "BodyType": "json",
    "ResponseType": "json"
  }
}

{
  "imports": {
    "<pkgName>": "github.com/org/repo/pkg"
  },
  "endpoints": {
    "<funcName>": {
      // ...
      "BodyFormat": "json",
      "BodyType": "*api.ACLLoginParams",
      "ResponseFormat": "json",
      "ResponseType": "*api.ACLToken"
    }
  }
}

[findkim]

rm

[mkeeler]

LGTM

[findkim]

Thanks for the review! I'll take another pass tomorrow to update documentation based on these changes.