2.0.0-rc.1

Probably the last release before 2.0.0 GA

What's Changed

SemVer Major

• [fix] The library must compile when no traits are enabled by @sebsto in #563

SemVer Minor

• Bump Amazon RDS version 19 PG 17 by @sebsto in #561
• Update toolchain and doc for 6.2 by @sebsto in #564

SemVer Patch

• Allow compiling on macOS by @fabianfett in #559

Full Changelog: 2.0.0-beta.3...2.0.0-rc.1