[pom] Require java 11 now

Author: hazendaz

pom.xml

@@ -58,6 +58,10 @@
   </distributionManagement>
 
   <properties>
+    <!-- Maven compiler options -->
+    <java.version>11</java.version>
+    <java.release.version>11</java.release.version>
+
     <clirr.comparisonVersion>1.2.0</clirr.comparisonVersion>
     <findbugs.onlyAnalyze>org.mybatis.caches.ehcache.*</findbugs.onlyAnalyze>
     <gcu.product>Cache</gcu.product>