feat: enable .help() and .version() by default

[bcoe]

Almost 100% of my applications written with yargs have this boilerplate:

const argv = require('yargs')
    .help()
    .version()
    .argv

I figured, why the heck don't we just enable .version and .help by default? (probably should have done this years ago).

BREAKING CHANGE: version and help keys are now enabled by default, and show up in help output; the implicit help command can no longer be enabled/disabled independently from the help command itself (which can now be disabled).

[ghost]

Any new release planned soon with this?

[bcoe]

@ghost this new feature is queued to go out in the next release of yargs, would love your help testing if you're interested:

npm i yargs@next 👍 will be published for real as soon as we've tested it thoroughly.