Provide a macOS installer about bazelisk HOT 3 OPEN

We can surely create an installer for Bazelisk, but it's a single binary with no dependencies that you can put anywhere, so do we really need one? Maybe we could instead add a one-liner to the README.md on how to install it, something like:

To install Bazelisk on Linux or macOS, just download and put it into /usr/local/bin:

$ curl -O /usr/local/bin/bazelisk https://github.com/philwo/bazelisk/releases/download/v0.0.1/bazelisk-darwin-amd64 && chmod +x /usr/local/bin/bazelisk

You can also put it anywhere else on your PATH, for example another popular location is $HOME/bin.

The Homebrew repo has the advantage of making auto-upgrading and deploying it to multiple machines easier (not specific to Homebrew, any package manager would), which is something that wouldn't be addressed by a standalone installer.

from bazelisk.

We actually have a Homebrew formula for Bazelisk: https://github.com/bazelbuild/homebrew-tap/blob/master/Formula/bazelisk.rb

from bazelisk.

I have a more involved shell script doing essentially what @philwo describes above in https://github.com/philwo/bazelisk/issues/37 (just mentioning it here before I close that issue)

from bazelisk.