text: Title: GET requests are sending body as `{}` and Content-Length equals 2
  Body: On GET every request ScanAPI is sending body as `{}` and Content-Length equals `2`. The body should be None and the Content-Length should be `0`.
  
  A small hack to fix this while we don't have a new version is to have an empty body in the GET request specification, like this:
  
  ```yaml
  path: /example
  method: get
  body:
  ```
  
  Related to: https://github.com/scanapi/scanapi/issues/237