message: Update Homebrew formula to v0.8.0
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/v0.7.1.tar.gz"
  - sha256 "6f4271cb546e8af46f26c806b186bd91282f4c20e76afbb6b8dae9b21cc12b9f"
  - version "0.7.1"
  + url "https://github.com/str4d/rage/archive/v0.8.0.tar.gz"
  + sha256 "727719d0d308998bb2600e730f7c287e40d0d9f77e77817bac03fe037c436449"
  + version "0.8.0"
  depends_on "rust" => :build
  