1627.v5c244c19f85f

💥 Breaking changes

• JEP-7 - Remove jruby support (#308) @timja

📦 Dependency updates

• Bump annotation-indexer from 1.15 to 1.16 (#307) @dependabot
• Bump jenkins-test-harness-htmlunit from 56.vf1eabfc274f8 to 66.v712ea44bccba (#306) @dependabot
• Bump commons-httpclient from 3.1 to 3.1-jenkins-3 (#295) @dependabot
• Bump mockito-core from 4.1.0 to 4.2.0 (#294) @dependabot

👻 Maintenance

• As of Java 9, _ is a keyword and may not be used as an identifier (#299) @basil
• Run CI build on Java 11 (#303) @basil
• Use @code rather than <tt> (#302) @basil
• Replace deprecated org.eclipse.jetty.util.ajax.JSON with non-deprecated net.sf.json (#297) @basil
• Suppress a spurious SpotBugs warning that only appears on Java 11 (#298) @basil
• INFRA-2908 - Update URLs for new home in jenkinsci (#296) @timja

🚦 Tests

• Test on more configurations (#304) @basil
• Use Java 8 in annotation tests (#300) @basil