Accessible Webex Tracking IDs & Custom User-Agent Header

Version 1.5 adds several minor backend improvements, including:

• Webex Tracking IDs are now prominently displayed for all API errors and warnings.

  Example Error Message:

  ApiError: [401] Unauthorized - The request requires a valid access token set in the Authorization request header. [Tracking ID: ROUTER_5F05F384-D9E9-01BB-00FF-4B0C804F00FF]
  

  You can also access the Tracking IDs via the tracking_id attribute available on the raised exception and warning objects.

  api = webexteamssdk.WebexTeamsAPI(access_token="abc")
  
  try:
      api.people.me()
  except webexteamssdk.ApiError as e:
      print(e.tracking_id)

• The webexteamssdk library now sends a custom User-Agent header (inspired by PIP's User-Agent header).

  Example User-Agent Header:

  webexteamssdk/1.5 {"implementation": {"name": "CPython", "version": "3.7.8"}, "distro": {"name": "macOS", "version": "10.15.5"}, "system": {"name": "Darwin", "release": "19.5.0"}, "cpu": "x86_64"}
  

• Minor package and PEP8 improvements.