Upgrade completion

[tiangolo]

✨ Upgrade completion.

Re-implement completion mixing ideas from click-completion and recent updates in Click. Fixing some issues in both and adding extra features.

Add support for modern PowerShell including PowerShell Core (the latest version, installable on Linux). The current PowerShell support in click-completion is obsolete and doesn't work in recent versions of Windows, like Windows 10 😞 . But with this re-implementation it is now supported, including help texts. ✔️

Now click-completion is not an optional dependency, it's all integrated into Typer. That also means Jinja and other click-completion requirements are no longer needed.

Add optional support for shellingham to auto-detect the shell to install completion.

But without installing shellingham --show-completion is now still available and becomes an optional argument that takes the shell for which to show completion. The same with --install-completion.

For it to work it's necessary to still monkeypatch Click, but now in a single place, a single function. It's all done automatically.

Shells supported:

• Bash
• Zsh
• Fish
• PowerShell
• Pwsh (PowerShell Core)

[github-actions]

🚀 Deployed on https://5e6e9a2e75ff9989c039f6f0--typertiangolo.netlify.com

[codecov-io]

Codecov Report

Merging #66 into master will decrease coverage by 0.05%.
The diff coverage is 99.28%.

@@            Coverage Diff             @@
##           master      #66      +/-   ##
==========================================
- Coverage   99.96%   99.90%   -0.06%     
==========================================
  Files         166      171       +5     
  Lines        2925     3313     +388     
==========================================
+ Hits         2924     3310     +386     
- Misses          1        3       +2     

Impacted Files	Coverage Δ
tests/test_completion/test_completion_install.py	97.36% <97.36%> (ø)
tests/test_completion/test_completion.py	97.72% <97.72%> (ø)
tests/test_completion/test_completion_complete.py	100.00% <100.00%> (ø)
...est_completion/test_completion_complete_no_help.py	100.00% <100.00%> (ø)
.../test_completion/test_completion_install_source.py	100.00% <100.00%> (ø)
tests/test_completion/test_completion_show.py	100.00% <100.00%> (ø)
tests/test_others.py	100.00% <100.00%> (ø)
typer/completion.py	100.00% <100.00%> (ø)
... and 4 more

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[github-actions]

🚀 Deployed on https://5e6e9ab6a4ac10403a966130--typertiangolo.netlify.com

[github-actions]

🚀 Deployed on https://5e6e9cc28d7c1a790a4575ee--typertiangolo.netlify.com

[github-actions]

🚀 Deployed on https://5e6e9d20e82e3d7380e7dfe9--typertiangolo.netlify.com

[github-actions]

🚀 Deployed on https://5e6f6033b6f80885c9acd5ea--typertiangolo.netlify.com

[github-actions]

🚀 Deployed on https://5e6f6bfba4ac1040c1965b82--typertiangolo.netlify.com