v2.23.0

What's Changed

• ci: add zizmor job to lint GH Actions by @mccutchen in #252
• test: undo synctest adoption by @mccutchen in #253
• test: fix lingering flaky test by @mccutchen in #256
• feat: support plain text responses /ip by @mccutchen in #257
• feat: improve cookie handling 🍪 by @mccutchen in #258

Full Changelog: v2.22.1...v2.23.0