message: Update Homebrew formula to v0.9.0
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/v0.8.1.tar.gz"
  - sha256 "f9f39c987d398163bb2e843e02b0008d86842cb30d70b4c1e3470d9a4b9de87d"
  - version "0.8.1"
  + url "https://github.com/str4d/rage/archive/v0.9.0.tar.gz"
  + sha256 "f5756004061f974e79607224864ceb3fdd50367272cc58aa5a755929cf1c70a3"
  + version "0.9.0"
  depends_on "rust" => :build
  