Update dependency pmd to v7.21.0

build.gradle

@@ -58,10 +58,11 @@ application {
 }
 
 pmd {
-    toolVersion = '7.20.0'
+    toolVersion = '7.21.0'
     ruleSetFiles = files 'pmd-ruleset.xml'
     ruleSets = [] // explicitly set to empty to avoid using default configuration
     ignoreFailures = false
+    consoleOutput = true
 }
 
 spotless {

src/main/java/com/ibm/sample/spark/flight/Asset.java

@@ -20,7 +20,7 @@ class Asset extends Entity {
      *
      * @return A project reference.
      */
-    public Project container() {
+    Project container() {
         return container;
     }
 }

src/main/java/com/ibm/sample/spark/flight/Entity.java

@@ -21,7 +21,7 @@ class Entity {
      *
      * @return An asset type key.
      */
-    public String key() {
+    String key() {
         return key;
     }
 
@@ -30,7 +30,7 @@ public String key() {
      *
      * @return An asset ID.
      */
-    public String id() {
+    String id() {
         return id;
     }
 }