Bump version to 4.0.1-SNAPSHOT.

Change-Id: Ic212e9415dc3b3a8ac1604c487fcf5227002494d
diff --git a/pom.xml b/pom.xml
index 8f87c9d..b9eac43 100644
--- a/pom.xml
+++ b/pom.xml
@@ -5,7 +5,7 @@
   <modelVersion>4.0.0</modelVersion>
 
   <groupId>eu.mulk.quarkus-googlecloud-jsonlogging</groupId>
-  <version>4.0.0</version>
+  <version>4.0.1-SNAPSHOT</version>
 
   <artifactId>quarkus-googlecloud-jsonlogging-parent</artifactId>
   <packaging>pom</packaging>