Bump clap from 2.34.0 to 3.0.0

[dependabot[bot]]

Bumps clap from 2.34.0 to 3.0.0.

Changelog

Sourced from clap's changelog.

[3.0.0] - 2021-12-31

Note: clap v3 has been in development for several years and has changed hands multiple times. Unfortunately, our changelog might be incomplete, whether in changes or their motivation.

Highlights

A special thanks to the maintainers, contributors, beta users, and sponsors who have helped along this journey, especially kbknapp.

StructOpt Integration

StructOpt provides a serde-like declarative approach to defining your parser. The main benefits we've seen so far from integrating are:

• Tighter feedback between the design of clap and the derives
• More universal traits. Crates exist for common CLI patterns (example) and we've re-designed the StructOpt traits so crates built on clap3 can be reused not just with other derives but also people using the builder API. People can even hand implement these so people using the builder API won't have the pay the cost for derives.

Custom Help Headings

Previously, clap automatically grouped arguments in the help as either ARGS, FLAGS, OPTIONS, and SUBCOMMANDS.

You can now override the default group with Arg::help_heading and App::subcommand_help_heading. To apply a heading to a series of arguments, you can set App::help_heading.

Deprecations

While a lot of deprecations have been added to clean up the API (overloaded meaning of Arg::multiple) or make things more consistent, some particular highlights are:

• clap_app! has been deprecated in favor of the builder API with arg! (clap-rs/clap#2835)
• Arg::from_usage has been deprecated in favor of arg! (clap-rs/clap#3087)
  • Porting example
• The YAML API has been deprecated in favor the builder or derive APIs (clap-rs/clap#3087)

Migrating

From clap v2

1. Add CLI tests, -h and --help output at a minimum (recommendation: trycmd for snapshot testing)
2. Update your dependency
   1. If you use no-default-features: add the std feature
3. Resolve compiler errors

... (truncated)

Commits

• c01ebba chore: Release
• bc951e4 chore: Release
• 0aa5fd2 Merge pull request #3236 from epage/complete
• 19b59a2 fix(complete): Better organize the API
• 8d73a0e chore: Release
• 24a2f3a Merge pull request #3235 from epage/complete
• 88a335f fix(complete): Give crates more specific names
• 2d7dc1f chore: Release
• 5360ffa Merge pull request #3233 from epage/ref
• 29d4508 docs(derive): Link to ref from traits
• Additional commits viewable in compare view

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Superseded by #11.