Upgrade maven deps to latest versions and fix new linter errors (#3772)

This also makes the Gradle build work with JDK 17.

The extra JVM args in gradle.properties works around a bug with spotless
and JDK 17: https://github.com/diffplug/spotless/issues/834

PMD.CloseResource was ignored because it's almost always a false
positive, and there are many of them.

wpilibNewCommands/src/test/java/edu/wpi/first/wpilibj2/command/CommandTestBase.java

@@ -13,7 +13,7 @@ import java.util.Set;
 import org.junit.jupiter.api.BeforeEach;
 
 /** Basic setup for all {@link Command tests}." */
-public abstract class CommandTestBase {
+public class CommandTestBase {
   protected CommandTestBase() {}
 
   @BeforeEach