v0.9.3

What's Changed

• Support read argument from environment variables only by @jxskiss in #31
• Support flag and arg completion for root command by @akemrir in #33

Full Changelog: v0.9.0...v0.9.3

Release v0.9.0

• New: support pointer flags. #22
• New: support grouping command into different categories in help. #23
• New: support flag value and positional arg completion by function. #27 (thanks @akemrir)
• Fix: typo in README.md. #28 (thanks @maartenverheul)
• Change: use capitalized words instead of all uppercase in usage title. #25

Release v0.8.1

Changes in v0.8.1:

• New: optional command options to customize help. #14
• New: shell completion for fish. #15 (thanks @akemrir)
• Fix completion of implicit command group. #16 (thanks @akemrir)

Changes in v0.8.0:

• New: support shell auto-completion. #11
• New: support single quote name in flag usage. #13
• Fix unnecessary space in usage output

Release v0.8.0

• New: support shell auto-completion. #11
• New: support single quote name in flag usage. #13
• Fix unnecessary space in usage output

Release v0.7.0

• New: support optional app description. #7
• New: support root command. #7
• Change: make app options be public accessible.
• Add more tests, increase coverage to 85%.

v0.6.3 - bugfix and more tests

• fix issues reported by goreportcard (#5, #6)
• fix some bugs and add more unit tests

v0.6.0 - bugfix

move changelog out of readme and release v0.6.0 (#4)

Change-Id: Ifb34f942065f4799a75ca63ec5691bd53b1fd857

v0.5.0 - new features

• New: validate non-flag arguments for invalid usage.
• New: support value implementing encoding.TextUnmarshaler, allowing command-line flags and arguments to have types such as big.Int, netip.Addr, and time.Time.
• New: add type Context to allow using func(*Context) as command action, making it easier to use manually created App.
• Change: drop support for Go < 1.17.

Full Changelog: v0.4.0...v0.5.0

v0.4.0 - New features

• New: add option to allow parsing posix-style single token multiple options.
• New: support alias commands.
• Change: remove api KeepCommandOrder, replaced by SetOptions.
• Change: optimize help padding.

v0.3.1 - fix parsing showHidden flag

release v0.3.1

Change-Id: Ib3533e5a25dc6da56af7c1a0e8d81060f6194b59