v0.15.0

What's Changed

• Add support for --use-spawn by @pencil in #199
• Add support for 3.14 and drop support for 3.9 by @andrewgy8 in #200
• Bump version to 0.15.0 and prep changelog by @andrewgy8 in #201

Full Changelog: v0.14.0...v0.15.0