Maven: Upgrade maven-compiler-plugin to 3.8.0

Change-Id: Idbbd6f5d07acef595855b64e011293624fb1c01f
diff --git a/pom.xml b/pom.xml
index 86c3e19..cc22f17 100644
--- a/pom.xml
+++ b/pom.xml
@@ -93,7 +93,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.7.0</version>
+                <version>3.8.0</version>
                 <configuration>
                     <source>1.8</source>
                     <target>1.8</target>