Enforcing Java 11

library/pom.xml

@@ -47,9 +47,9 @@
         <github.global.server>github</github.global.server>
         <additionalparam>-Xdoclint:none</additionalparam>
         <!-- Skip error check for javadoc -->
-        <maven.compiler.compilerVersion>8</maven.compiler.compilerVersion>
-        <maven.compiler.source>8</maven.compiler.source>
-        <maven.compiler.target>8</maven.compiler.target>
+        <maven.compiler.compilerVersion>11</maven.compiler.compilerVersion>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
         <maven.deploy.skip>true
         </maven.deploy.skip><!-- do deploy to maven central, parent project does not and inherits -->
 
@@ -76,6 +76,12 @@
             <groupId>org.apache.xmlgraphics</groupId>
             <artifactId>fop</artifactId>
             <version>2.9</version>
+            <exclusions>
+              <exclusion>
+                <groupId>xml-apis</groupId>
+                <artifactId>xml-apis</artifactId>
+              </exclusion>
+            </exclusions>
         </dependency>
 
         <dependency>
@@ -162,7 +168,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.6.1</version>
+                <version>3.13.0</version>
                 <configuration>
                     <descriptorRefs>
                         <descriptorRef>jar-with-dependencies</descriptorRef>
@@ -170,8 +176,8 @@
                     <!-- http://stackoverflow.com/questions/574594/how-can-i-create-an-executable-jar-with-dependencies-using-maven
                         mvn clean compile assembly:single -->
                     <!-- or whatever version you use -->
-                    <source>8</source>
-                    <target>8</target>
+                    <source>11</source>
+                    <target>11</target>
                 </configuration>
             </plugin>
             <plugin>
@@ -212,7 +218,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-source-plugin</artifactId>
-                <version>3.2.1</version>
+                <version>3.3.1</version>
                 <executions>
                     <execution>
                         <id>attach-sources</id>
@@ -225,7 +231,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
-                <version>3.2.1</version>
+                <version>3.5.3</version>
                 <configuration>
                     <shadedArtifactAttached>true</shadedArtifactAttached>
                     <minimizeJar>false