Micronaut RxJava 2 2.0.0-M7

What's Changed

Dependency updates 🚀

• Update plugin io.micronaut.build.shared.settings to v6.5.3 by @renovate in #165
• Update dependency org.apache.groovy:groovy-json to v4.0.13 by @renovate in #166
• Update dependency io.micronaut:micronaut-core-bom to v4.0.0-RC4 by @renovate in #164

Other Changes 💡

• RxJava2 to RC5 by @sdelamo in #169

Full Changelog: v2.0.0-M6...v2.0.0-M7