Change log:
ed143ba Upgrade dependencies; prepare for release
f64b602 Fix code smell in the JdbcChannelMessageStore
5ec8913 Fix pattern how Lock.unlock() is used
dbc8af9 GH-3591: Add gateway() section into dsl.adoc
af9e69c Make MessageHistory JSON-serializable
9c718c3 GH-3424: Refactor to use logging methods from LogAccessor
39c3acb Fix ZMQMessageHandlerTests race condition
0297f6b Fix dsl.adoc for the actual API around Supplier
ca9c919 Fix new sonar smell
4b83241 Fix new Sonar smells
920b8ae ZeroMQ test: Add sleep between SUB & PUB
a577652 Fix SourcePollingChAdFB autoStartup propagation
db4f120 Functional gateway bean definitions
1ac1633 Remove unused imports
b103752 Fix NPE for @Indexed in the MessagingGatewayReg
3cf1d35 Fix CORS registration for IntGraphController
76f77cc GH-3584: Support spring-amqp 2.3.x and 2.4.x