Issue #628 : Updated the compiler source and target to 11 and added Xlint unchecked

Author: harshal301002

pom.xml

@@ -3,8 +3,8 @@
   <properties>
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
     <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
-    <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.scope>provided</maven.scope>
     <maven.version>3.6.3</maven.version>
     <maven.plugin.version>3.10.2</maven.plugin.version>
@@ -212,6 +212,15 @@
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
           <version>3.12.1</version>
+          <configuration>
+                <source>${maven.compiler.source}</source>
+                <target>${maven.compiler.target}</target>
+                <encoding>${project.build.sourceEncoding}</encoding>
+                <compilerArgs>
+                    <arg>-Xlint:deprecation</arg>
+                    <arg>-Xlint:unchecked</arg>
+                </compilerArgs>
+            </configuration>
         </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>