message: Update Homebrew formula to v0.6.0
diff: class Rage < Formula
  desc "[BETA] A simple, secure, and modern encryption tool."
  homepage "https://str4d.xyz/rage"
  - url "https://github.com/str4d/rage/archive/v0.5.1.tar.gz"
  - sha256 "aad525028966843e0d18f893221c5951955f6b84e5fab34dc1e7bbc52a519e2a"
  - version "0.5.1"
  + url "https://github.com/str4d/rage/archive/v0.6.0.tar.gz"
  + sha256 "fc4d2f095cd89f3159e40359b443d46564e817768915456976cb1853bc199551"
  + version "0.6.0"
  depends_on "rust" => :build
  