JUnit Jupiter best practices (#91)

Co-authored-by: Moderne <[email protected]>

Author: slachiewicz

src/test/java/org/codehaus/plexus/velocity/DefaultVelocityComponentTest.java

@@ -29,13 +29,13 @@
 import static org.junit.jupiter.api.Assertions.assertNotNull;
 
 @PlexusTest
-public class DefaultVelocityComponentTest {
+class DefaultVelocityComponentTest {
 
     @Inject
     private VelocityComponent velocity;
 
     @Test
-    public void testBasic() {
+    void basic() {
 
         // test the properties
         String value = (String) velocity.getEngine().getProperty("hello");