#5 Fix Maven build for Java 11.

Author: dhendriks

pom.xml

@@ -1,4 +1,5 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+    xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
 
     <modelVersion>4.0.0</modelVersion>
 
@@ -35,6 +36,22 @@
 
     <build>
         <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <encoding>UTF-8</encoding>
+                    <failOnWarning>true</failOnWarning>
+                    <parameters>true</parameters>
+                    <release>11</release>
+                    <showDeprecation>true</showDeprecation>
+                    <showWarnings>true</showWarnings>
+                    <source>11</source>
+                    <target>11</target>
+                </configuration>
+            </plugin>
+
             <plugin>
                 <artifactId>maven-deploy-plugin</artifactId>
                 <version>2.8.2</version>