textproc/py-python-lsp-server: Update to 1.5.0

Major release with new features and changes:

- Add DiagnosticTag tags for Pylint, Pycodestyle, and Flake8 plugins
- Add support to connect to the server through websockets
- Allow multiple per-file-ignores for the same pattern in Flake8 plugin
- Parse YAPF diffs into TextEdits
- Add support for LSP formatting options parameter

Changelog: https://github.com/python-lsp/python-lsp-server/compare/v1.4.1...v1.5.0

The port adds some more test dependencies and the new port textproc/py-whatthepatch.
Use USES=pytest instead of target test. First time, that most tests do work now :)

Reported by:	portscout, Repology