chore: release 17.0.0

[github-actions]

🤖 I have created a release *beep* *boop*

17.0.0 (2021-04-08)

⚠ BREAKING CHANGES

• implicitly private methods are now actually private
• deprecated reset() method is now private (call yargs() instead).
• yargs-factory: refactor yargs-factory to use class (refactor(yargs-factory)!: refactor yargs-factory to use class yargs/yargs#1895)
• .positional() now allowed at root level of yargs.
• coerce: coerce is now applied before validation.
• async: yargs now returns a promise if async or check are asynchronous.
• middleware: global middleware now applied when no command is configured.
• feat!: improve support for async/await yargs/yargs#1823 contains the following breaking API changes:
  • now returns a promise if handler is async.
  • onFinishCommand removed, in favor of being able to await promise.
  • getCompletion now invokes callback with err and `completions, returns promise of completions.

Features

• add commands alias (similar to options function) (#1850) (00b74ad)
• add parseSync/parseAsync method (#1898) (6130ad8)
• add support for showVersion, similar to showHelp (#1831) (1a1e2d5)
• adds support for async builder (#1888) (ade29b8), closes #1042
• allow calling standard completion function from custom one (#1855) (31765cb)
• allow default completion to be referenced and modified, in custom completion (#1878) (01619f6)
• async: add support for async check and coerce (#1872) (8b95f57)
• improve support for async/await (#1823) (169b815)
• locale: add Ukrainian locale (#1893) (c872dfc)
• middleware: async middleware can now be used before validation. (e0f9363)
• middleware: global middleware now applied when no command is configured. (e0f9363)

Bug Fixes

• always cache help message when running commands (#1865) (d57ca77), closes #1853
• async: don't call parse callback until async ops complete (#1896) (a93f5ff), closes #1888
• deno: use actual names for keys instead of inferring (#1891) (b96ef01)
• exclude positionals from default completion (#1881) (0175677)
• Deno bundle yargsParser initialization failure yargs/yargs#1841 (comment) (b96ef01)
• showHelp() and .getHelp() now return same output for commands as --help (#1826) (36abf26)
• zsh completion is now autoloadable (#1856) (d731f9f)

Code Refactoring

• coerce: coerce is now applied before validation. (8b95f57)
• deprecated reset() method is now private (call yargs() instead). (376f892)
• implicitly private methods are now actually private (376f892)
• yargs-factory: refactor yargs-factory to use class (#1895) (376f892)

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