This continues #247 Changelog: - Upstream: https://github.com/servo/stylo/compare/b98470a5cbd3792db79366ec1559d72231ef2c1f...d71fd89b781dca6e92ee9a6e683269c3e6a28115 - Servo fixups: https://github.com/servo/stylo/compare/4714bab122cc233eaf7e8330bdfbf55ab859efa8...7481d7f7afe698b1ad141755f6f525857da7bc49 Servo PR: https://github.com/servo/servo/pull/40522
