1259.v8f2448483000

🚀 New features and improvements

• Allow developer control of parallel testing (#312) @MarkEWaite

👻 Maintenance

• Allow developer control of parallel testing (#312) @MarkEWaite
• Set Spotbugs to maximum effort and fixed issues (#329) @StefanSpieker
• Replaced StringUtils.trimToNull() with JDK method (#328) @StefanSpieker
• Set spotbugs threshold on medium and fixed findings (#327) @StefanSpieker

📦 Dependency updates

• build: bump io.jenkins.tools.bom:bom-2.387.x from 2465.va_e76ed7b_3061 to 2543.vfb_1a_5fb_9496d (#320) @dependabot
• build: bump org.jenkins-ci.plugins:plugin from 4.86 to 4.87 (#326) @dependabot
• build: bump org.xmlunit:xmlunit-core from 2.9.1 to 2.10.0 (#316) @dependabot