Add homebrew option to nvm installation

[antonioalmeida]

There is a homebrew formula for nvm. It is not "officially" supported by nvm, but it's always in line with the stable version.

It works well and I believe it's better to include it instead of just displaying a script for a specific (now outdated) version of nvm.

[simeg]

Thanks @antonioalmeida!

[antonioalmeida]

Been using this project for a while, glad to contribute. Also, do you mind adding the hacktoberfest-accepted tag to this PR?

[simeg]

@antonioalmeida This repo is not eligible for Hacktoberfest right now, it's lacking the topic hacktoberfest which I don't have permission to add.

@sb2nov please chime in

[antonioalmeida]

You don't need to add the hacktoberfest tag to the repository. An alternative is on a PR-basis, by adding the hacktoberfest-accepted label to each accepted PR

[simeg]

@antonioalmeida You're right, I didn't read closely enough :)

[sb2nov]

Thanks @antonioalmeida added the hacktoberfest topic to the repo to encourage others to participate :)