Bumping version to 2.4-SNAPSHOT

Change-Id: I1f30b30740d85a44516f5a6993c17d35f83b6ec3
diff --git a/compiler/api/pom.xml b/compiler/api/pom.xml
index 3c6096d..eb2200e 100644
--- a/compiler/api/pom.xml
+++ b/compiler/api/pom.xml
@@ -21,7 +21,7 @@
     <parent>
         <groupId>org.onosproject</groupId>
         <artifactId>onos-yang-compiler</artifactId>
-        <version>2.3.1</version>
+        <version>2.4-SNAPSHOT</version>
     </parent>
 
     <artifactId>onos-yang-compiler-api</artifactId>