Update version to next snapshot

Change-Id: I8643d5743f4e9cb04f70f666b08f67d27ff2fa3d
diff --git a/api/pom.xml b/api/pom.xml
index 1c7752f..b7dfb49 100644
--- a/api/pom.xml
+++ b/api/pom.xml
@@ -22,7 +22,7 @@
     <parent>
         <artifactId>olt</artifactId>
         <groupId>org.opencord</groupId>
-        <version>1.3.0</version>
+        <version>1.3.1-SNAPSHOT</version>
         <relativePath>../pom.xml</relativePath>
     </parent>