Dev version bump [skip ci]

Author: nblumhardt

src/Serilog.Sinks.Async/Serilog.Sinks.Async.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <Description>Asynchronous sink wrapper for Serilog.</Description>
-    <VersionPrefix>1.5.0</VersionPrefix>
+    <VersionPrefix>1.5.1</VersionPrefix>
     <Authors>Jezz Santos;Serilog Contributors</Authors>
     <TargetFrameworks>net45;netstandard1.1;net461;netstandard2.0</TargetFrameworks>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>