Release v2.8.1

What's Changed

• ci: remove ubuntu 20.04 runners by @MarkusJx in #119
• fix(bridge): re-introduce isPackagedElectron flag for java lib by @MarkusJx in #118
• feat(java): convert to named module by @MarkusJx in #120
• ci(publish): update workflow by @MarkusJx in #121

Full Changelog: v2.8.0...v2.8.1