Update Release Notes

RELEASENOTES.md

@@ -1,3 +1,10 @@
+# 1.9.3
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+ - [#90](https://github.com/pardahlman/RawRabbit/issues/90) - Default Error Strategy tries to Ack Message twice +fix
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+Commits: e92022aa6f...186e67157b
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+
 # 1.9.2
 
 .NET Core came a step closer to completion With the [announcement of the release of RC2](https://blogs.msdn.microsoft.com/webdev/2016/05/16/announcing-asp-net-core-rc2/). The new releases of Logging, Dependecy Injection and Configuration had a few breaking changes was handled. `RawRabbit` is now fully migrated to the new project structure. There are [new sample projects](https://github.com/pardahlman/RawRabbit/tree/master/sample) that combines .NET Core with RawRabbit (including Attributed Routing, Message Sequence etc.) and Serilog.
@@ -16,6 +23,7 @@ The underlying dependecy `RabbitMQ.Client` was updated, as it  [ 3.6.2 was relea
 
 Commits: b68cf973fa...e92022aa6f
 
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 # 1.9.1
 
  - [#80](https://github.com/pardahlman/RawRabbit/issues/80) - Use same JsonSerializer throughout the client