text: Title: Improve Access Logs
  Body: We are moving some of our django applications to run inside a lambda. When we did so we lost access logs and gained logs that don't have much information. It would be useful if the Mangum Request/Response had additional log information or a mechanism was added to make logging access logs easy.
  
  Example.  WSGI access logs
  ```
  GET /v2/resource HTTP/1.1" 200 686
  GET /v2/resource/123 HTTP/1.1" 200 686
  POST /v2/resource/123 HTTP/1.1" 400 128
  ```
  
  Mangum Access Logs for the same thing
  ```
  HTTPCycleState.REQUEST:  'http.response.start' event received from application.
  HTTPCycleState.RESPONSE:  'http.response.body' event received from application.
  HTTPCycleState.REQUEST:  'http.response.start' event received from application.
  HTTPCycleState.RESPONSE:  'http.response.body' event received from application.
  HTTPCycleState.REQUEST:  'http.response.start' event received from application.
  HTTPCycleState.RESPONSE:  'http.response.body' event received from application.
  ```