v0.18.2 Release

New Features

• gRPC compatibility layer
  d432c1f Thrift2Grpc compatibility layer (#1105)
  eb5bff7 Compatibility layer fix (#1120)
• Feature flags
  61495d9 Support feature flags in client (#1103)
• IsCron support
  97f887f Update client idls to support IsCron (#1095)

Bug fixes & improvements

ed86b8a Clear workflow state when not cached and not complete (#1111)
16d20b1 Truncate history for query based on nextEventID (#1096)
94b0e07 Ignore workflowPanicError in query task and add warn logs (#1094)
2b88fb1 Relax nondeterministc check (#1093)

Other

88d9c90 Increment library version to 0.18 (#1108)
ca6e026 Decouple Client from worker part of SDK (#1100)
037a846 Update yarpc to the latest version (#1091)