v2.4.0 Release

Note that some of the new feature must be used with server version 1.8+:

• RPC locking
• execute API failure policy

What's Changed

• Support consuming N message in a single command by @zklgame in #198
• Add tryGettingSimpleWorkflowResult and tryGettingComplexWorkflowResult by @zklgame in #199
• Add execute API failure policy support by @longquanzheng in #205
• Support persistence locking in RPC by @longquanzheng in #206

Full Changelog: v2.3.0...v2.4.0