Dropping a dependency is a breaking change; bump dev version to 3.0

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>2.0.1</VersionPrefix>
+    <VersionPrefix>3.0.0</VersionPrefix>
     <Authors>Serilog Contributors</Authors>
     <TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
     <TreatWarningsAsErrors>true</TreatWarningsAsErrors>