GH-127 - Improve compiler plugin setup.

Author: odrotbohm

Diff for: pom.xml

@@ -136,11 +136,6 @@
 				<groupId>org.apache.maven.plugins</groupId>
 				<artifactId>maven-compiler-plugin</artifactId>
 				<version>3.13.0</version>
-				<configuration>
-					<source>1.8</source>
-					<target>1.8</target>
-					<release>8</release>
-				</configuration>
 				<executions>
 					<execution>
 						<id>default-compile</id>
@@ -154,6 +149,7 @@
 							<goal>compile</goal>
 						</goals>
 						<configuration>
+							<release>8</release>
 							<excludes>
 								<exclude>**/module-info.java</exclude>
 							</excludes>