python-websocket-client: update to 1.3.1

python-websocket-client: update to 1.3.1

- 1.3.1:
  - Fix 10 year old bug and improve dispatcher handling for
  run_forever
  - Fix run_forever to never return None, only return True or False,
  and add two tests
  - Remove Python 3.6 support, EOL in Dec 2021

- 1.3.0:
  - BREAKING: Set Origin header to use https:// scheme when wss://
  WebSocket URL is passed
  - Replace deprecated/broken WebSocket URLs with working ones
  (6ad5197)
  - Add documentation referencing rel for automatic reconnection with
  run_forever()
  - Add missing opcodes 1012, 1013
  - Add errno.ENETUNREACH to improve error handling (da1b050)
  - Minor documentation improvements and typo fixes

- 1.2.3:
  - Fix broken run_forever() functionality

- 1.2.2:
  - Migrate wsdump script in setup.py from scripts to newer
  entry_points
  - Add support for ssl.SSLContext for arbitrary SSL parameters
  - Remove keep_running variable
  - Remove HAVE_CONTEXT_CHECK_HOSTNAME variable (dac1692)
  - Replace deprecated ssl.PROTOCOL_TLS with ssl.PROTOCOL_TLS_CLIENT
  - Simplify code and improve Python 3 support
  - Fill default license template fields
  - Update CI tests
  - Improve documentation

Signed-off-by: Javier Marcet <javier@marcet.info>