Bring project entirely up to date including fixing pmd removed property and running off java 21

.gitattributes

@@ -0,0 +1,22 @@
+# Auto detect text files and perform LF normalization
+* text=auto
+
+# Custom for Visual Studio
+*.cs     diff=csharp
+*.sln    merge=union
+*.csproj merge=union
+*.vbproj merge=union
+*.fsproj merge=union
+*.dbproj merge=union
+
+# Standard to msysgit
+*.doc	 diff=astextplain
+*.DOC	 diff=astextplain
+*.docx diff=astextplain
+*.DOCX diff=astextplain
+*.dot  diff=astextplain
+*.DOT  diff=astextplain
+*.pdf  diff=astextplain
+*.PDF	 diff=astextplain
+*.rtf	 diff=astextplain
+*.RTF	 diff=astextplain

.github/workflows/maven.yml

@@ -13,20 +13,20 @@ jobs:
 
     steps:
     - name: Check out Git repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Java and Maven
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
         distribution: zulu
-        java-version: 18
+        java-version: 21
         cache: maven
 
     - name: Build with Maven
       run: mvn -B verify
 
     - name: Upload integration test log and settings on failure
-      uses: actions/upload-artifact@v3
+      uses: actions/upload-artifact@v4
       if: failure()
       with:
         name: integration-test-log
@@ -42,13 +42,13 @@ jobs:
 
     steps:
     - name: Check out Git repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
 
     - name: Set up Java and Maven
-      uses: actions/setup-java@v3
+      uses: actions/setup-java@v4
       with:
         distribution: zulu
-        java-version: 11
+        java-version: 21
         cache: maven
         server-id: ossrh
         server-username: MAVEN_USERNAME