Bump version to 3.1.3-SNAPSHOT.

Change-Id: Icacce54f78bb1f90d42bf2cf11fdda05df83f973
diff --git a/pom.xml b/pom.xml
index c190c42..5cd0527 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>eu.mulk.quarkus-googlecloud-jsonlogging</groupId>
-  <version>3.1.2</version>
+  <version>3.1.3-SNAPSHOT</version>
 
   <artifactId>quarkus-googlecloud-jsonlogging-parent</artifactId>
   <packaging>pom</packaging>