Revert dev build number to 5.0.0

Author: nblumhardt

src/Serilog.Expressions/Serilog.Expressions.csproj

@@ -3,7 +3,7 @@
   <PropertyGroup>
     <Description>An embeddable mini-language for filtering, enriching, and formatting Serilog
       events, ideal for use with JSON or XML configuration.</Description>
-    <VersionPrefix>5.0.1</VersionPrefix>
+    <VersionPrefix>5.0.0</VersionPrefix>
     <Authors>Serilog Contributors</Authors>
     <!-- .NET Framework version targeting is frozen at these two TFMs. -->
     <TargetFrameworks Condition=" '$(OS)' == 'Windows_NT'">net471;net462</TargetFrameworks>