Update Maven version to 1.2-SNAPSHOT

Author: cjneasbi

Dockerfile

@@ -1,7 +1,7 @@
 ARG JDK_VERSION
 FROM openjdk:${JDK_VERSION}-jre-slim
 
-ARG MVN_VERSION=1.1-SNAPSHOT
+ARG MVN_VERSION=1.2-SNAPSHOT
 ENV MVN_VERSION=${MVN_VERSION}
 LABEL version=${MVN_VERSION}