Help test arg support in Mage

[Nate Finch]

Mage (magefile.org and github.com/magefile/mage) is getting support for arguments in targets and dependencies.  I'd love some people running the PR branch through its paces to make sure I haven't missed anything before landing it, since this is kind of a big change.

(tl;dr - you can pass args of type int, string, bool, time.Duration to targets as positional args on the CLI)

You can grab the branch by running

go get github.com/magefile/mage@nargs

Then try adding mage targets with arguments. Note the new docs here:

https://deploy-preview-326--beautician-tilling-16528.netlify.app/targets/

And try making dependencies with arguments, also new docs here:

https://deploy-preview-326--beautician-tilling-16528.netlify.app/dependencies/

Comments on any and all of it, including docs, are most welcome!

Leave comments on the PR or in this thread.

Thanks!

-Nate