2.0.0-rc-2 - preparations for 2.0.0-final

Notable changes:

• Add closeStagingRepositories and releaseStagingRepositories summary tasks - #236 (PR by @Vampire)
• Require Gradle 6.2+ (PRs by @TWiStErRob)
• Ability to build itself with Gradle 8.5
• Multiple internal refactorings and improved idiomaticity (PRs by @TWiStErRob and @3flex)
• Drop kotlin-dsl plugin and remove redundant buildSrc - #295 and #301 (PRs by @3flex)
• Make the artifact ID explicit rather than relying on implicit naming - #255 (PR by @TWiStErRob)
• Massive dependency upgrades with Renovate

Backward incompatible changes

• closeAndReleaseStagingRepository has been renamed to closeAndReleaseStagingRepositories for consistency

Full list of changes: v2.0.0-rc-1...v2.0.0-rc-2

Thanks to all the contributors to this release: @TWiStErRob, @3flex, @Goooler, @Vampire, @espertus and @renovate-bot ;-).