Release v0.21.1

What's Changed

• fix(deps): make ureq dependency actually rustls-no-provider - stop pulling in ring by @gillyobeast (https://github.com/gillyobeast) in #771 (#771)
• fix: isolate buildkit proto fetch feature so library consumers no longer pull in ureq transitively by @fussybeaver (https://github.com/fussybeaver)
  New Contributors
• @gillyobeast (https://github.com/gillyobeast) made their first contribution in #771 (#771)
  Full Changelog: v0.21.0...v0.21.1 (v0.21.0...v0.21.1)