[1.4.0] Feature: API & Hidden questions

• feat Support hidden questions for internal usage. #50
• feat(event) Support event for addons.
• feat(timeout) Add a EXPIRED result for timeout requests.

What's Changed

• build(deps): Bump deps.easyplugin.version from 1.5.11 to 1.5.12 by @dependabot in #49
• build(deps): Bump org.apache.maven.plugins:maven-shade-plugin from 3.5.1 to 3.5.2 by @dependabot in #51

Full Changelog: 1.3.1...1.4.0