Package version is increased from 2.1.5 to 2.1.6

Author: sbellware

message-db.gemspec

@@ -1,7 +1,7 @@
 # -*- encoding: utf-8 -*-
 Gem::Specification.new do |s|
  s.name = 'message-db'
- s.version = '2.1.5'
+ s.version = '2.1.6'
  s.summary = 'Microservice native event store and message store for Postgres'
  s.description = ' '