Add buck Yang plugin

Change-Id: I1bb6a47a81fc05eabe744fd5032fc165aa0a9b55
diff --git a/plugin/maven/pom.xml b/plugin/maven/pom.xml
index 9acae97..b2039b9 100644
--- a/plugin/maven/pom.xml
+++ b/plugin/maven/pom.xml
@@ -83,6 +83,12 @@
             <version>1.7.21</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.12</version>
+            <scope>test</scope>
+        </dependency>
     </dependencies>
 
     <build>