Bump version to 3.1.2-SNAPSHOT.

Change-Id: I2a111b0db2d140860535e1d8e5ca1d3953d8c68a
diff --git a/runtime/pom.xml b/runtime/pom.xml
index 7473eff..ad46e8f 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>3.1.1</version>
+    <version>3.1.2-SNAPSHOT</version>
   </parent>
 
   <artifactId>quarkus-googlecloud-jsonlogging</artifactId>