Use maven.compiler.release property and target 17 to suppress warnings

Author: mpkorstanje

.github/workflows/build.yml

@@ -22,7 +22,7 @@ jobs:
       - uses:
           AdoptOpenJDK/install-jdk@v1
         with:
-          version: '11'
+          version: '17'
       - name: test maven
         run: |
           cd maven

maven/pom.xml

@@ -10,7 +10,7 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <java.version>1.8</java.version>
+        <maven.compiler.release>17</maven.compiler.release>
     </properties>
 
     <dependencyManagement>
@@ -71,11 +71,6 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
                 <version>3.13.0</version>
-                <configuration>
-                    <encoding>UTF-8</encoding>
-                    <source>${java.version}</source>
-                    <target>${java.version}</target>
-                </configuration>
             </plugin>
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>