Update click requirement from <8 to <9

[dependabot]

Updates the requirements on click to permit the latest version.

Release notes

Sourced from click's releases.

8.1.7

This is a fix release for the 8.1.x feature branch.

• Changes: https://click.palletsprojects.com/en/8.1.x/changes/#version-8-1-7
• Milestone: https://github.com/pallets/click/milestone/22?closed=1

Changelog

Sourced from click's changelog.

Version 8.1.7

Released 2023-08-17

• Fix issue with regex flags in shell completion. :issue:2581
• Bash version detection issues a warning instead of an error. :issue:2574
• Fix issue with completion script for Fish shell. :issue:2567

Version 8.1.6

Released 2023-07-18

• Fix an issue with type hints for @click.group(). :issue:2558

Version 8.1.5

Released 2023-07-13

• Fix an issue with type hints for @click.command(), @click.option(), and other decorators. Introduce typing tests. :issue:2558

Version 8.1.4

Released 2023-07-06

• Replace all typing.Dict occurrences to typing.MutableMapping for parameter hints. :issue:2255
• Improve type hinting for decorators and give all generic types parameters. :issue:2398
• Fix return value and type signature of shell_completion.add_completion_class function. :pr:2421
• Bash version detection doesn't fail on Windows. :issue:2461
• Completion works if there is a dot (.) in the program name. :issue:2166
• Improve type annotations for pyright type checker. :issue:2268
• Improve responsiveness of click.clear(). :issue:2284
• Improve command name detection when using Shiv or PEX. :issue:2332
• Avoid showing empty lines if command help text is empty. :issue:2368
• ZSH completion script works when loaded from fpath. :issue:2344.
• EOFError and KeyboardInterrupt tracebacks are not suppressed when standalone_mode is disabled. :issue:2380
• @group.command does not fail if the group was created with a custom command_class. :issue:2416
• multiple=True is allowed for flag options again and does not require

... (truncated)

Commits

• 874ca2b release version 8.1.7
• 6e1f6d3 completion(fish): add back ; as line endings in fish script (#2570)
• a955c77 update fish enabling script
• 3c1529e add back semicolons in fish script
• a260ca6 Replace bash shell completion version error with warning (#2576)
• d9db70c bash version support shows warning instead of error
• 22b9b1c Fix incorrect passing of flags to re.sub (#2581)
• d69d210 fix flake8 finding
• af2da1e Fix incorrect passing of flags to re.sub
• bb6a872 start version 8.1.7
• Additional commits viewable in compare view

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[Carreau]

@dependabot rebase