📦 Dependency updates

• Update sisu.inject to 0.9.0.M2
• Bump guice from 5.1.0 to 6.0.0
• Bump commons-io:commons-io from 2.11.0 to 2.15.1
• Bump plexus-utils from 3.5.0 to 4.0.0

👻 Maintenance

• JUnit4 to 5 migration (#111) @slachiewicz
• Code cleanup (#113) @slachiewicz
• Reuse plexus-pom action for CI (#122) @slachiewicz
• Bump org.codehaus.plexus:plexus-testing from 1.1.0 to 1.3.0