v2.4.0

Release notes article -> https://www.asyncapi.com/blog/release-notes-2.4.0

Features

• Add messageId property by @WaleedAshraf
• Add server variable object as reusable object by @danielkocot
• Add security at the operation level by @sekharbans-ebay

Fixes

• Allow to use union type of Server and Reference objects by @char0n

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Full Changelog: v2.3.0...v2.4.0