Deprecate --version and add support for -v

[NobodyXu]

--version is misleading https://github.com/taiki-e/install-action/issues/14

And cargo-binstall needs a -v to obtain its version easily.

[passcod]

It is a bit, but also cargo-install has --version. I'm reluctant to remove it because having this "drop in replacement to cargo-install in most cases" aspect is useful.

We can definitely add -V to show the version, like cargo itself has.

[NobodyXu]

Completed in #259