2.0.0-RC8

Patch Changes

• [generator] Fix issue generating nested additional types (#615) @smyrick
• Update completable future mapping for coroutines (#613) @smyrick

Non-version Changes

• [docs] Fix publish directory (#618) @smyrick
• Publish the build directory in the website (#617) @smyrick
• Update publish docs to use a community action (#614) @smyrick
• Upgrade Gradle version and cache based on Java version (#612) @smyrick
• Update READMEs and example docs (#609) @smyrick