chore: bump JDK version from 8 (unsupported) to 11

Author: bamthomas

pom.xml

@@ -40,8 +40,8 @@
 
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    <maven.compiler.source>1.8</maven.compiler.source>
-    <maven.compiler.target>1.8</maven.compiler.target>
+    <maven.compiler.source>11</maven.compiler.source>
+    <maven.compiler.target>11</maven.compiler.target>
     <maven.test.redirectTestOutputToFile>true</maven.test.redirectTestOutputToFile>
 
     <jackson.version>2.15.1</jackson.version>