v2.21.0

v2.21.0 (minor)

Changes since v2.20.0:

• Print each log line once instead of again through a console logging provider [patch] (@Claude)
• Pass the test context's cancellation token in the author email test (@Claude)
• Link changelog authors by GitHub login, not display name [minor] (@Claude)

What's Changed

• Print each log line once instead of again through a console logging provider [patch] by @matt-edmondson in #245
• Link changelog authors by GitHub login, not display name [minor] by @matt-edmondson in #244

Full Changelog: v2.20.0...v2.21.0