MIME4J-289 Upgrade maven-compiler-plugin 3.0 -> 3.8.1
diff --git a/pom.xml b/pom.xml
index 792c594..00f7b5a 100644
--- a/pom.xml
+++ b/pom.xml
@@ -207,7 +207,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.0</version>
+                <version>3.8.1</version>
                 <configuration>
                     <optimize>true</optimize>
                     <source>${target.jdk}</source>