Release v3.0.0

What's Changed

• Change build process to pure (Tycho-less) Maven by @larsk21 in #76
• Bump various dependency versions (merge from Dependabot) by @larsk21 in #84
• Add release workflow by @larsk21 in #90
• Explicitly release from staging by @larsk21 in #91
• Bump various dependency versions (merge from Dependabot) by @larsk21 in #92

Full Changelog: 2.1.5...v3.0.0