Bump version to 3.1.3-SNAPSHOT.

Change-Id: Icacce54f78bb1f90d42bf2cf11fdda05df83f973
diff --git a/runtime/pom.xml b/runtime/pom.xml
index 342427f..bf6085c 100644
--- a/runtime/pom.xml
+++ b/runtime/pom.xml
@@ -7,7 +7,7 @@
   <parent>
     <groupId>eu.mulk.quarkus-googlecloud-jsonlogging</groupId>
     <artifactId>quarkus-googlecloud-jsonlogging-parent</artifactId>
-    <version>3.1.2</version>
+    <version>3.1.3-SNAPSHOT</version>
   </parent>
 
   <artifactId>quarkus-googlecloud-jsonlogging</artifactId>