update hazelcast to 3.12.12

build.gradle

@@ -264,7 +264,7 @@ subprojects {
       dependency "com.google.protobuf:protobuf-java:${protobufVersion}"
       // Do not upgrade H2 to 1.4.200 because of instability: https://github.com/h2database/h2database/issues/2205
       dependency 'com.h2database:h2:1.4.199'
-      dependencySet(group: 'com.hazelcast', version: '3.12.9') {
+      dependencySet(group: 'com.hazelcast', version: '3.12.12') {
         entry 'hazelcast'
         entry 'hazelcast-client'
       }