Prepare for 2.4.0

Author: oschwald

MaxMind.Db/MaxMind.Db.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <Description>.NET reader for the MaxMind DB file format</Description>
-    <VersionPrefix>2.3.0</VersionPrefix>
+    <VersionPrefix>2.4.0</VersionPrefix>
     <TargetFrameworks>net45;netstandard1.4;netstandard2.0</TargetFrameworks>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <AssemblyName>MaxMind.Db</AssemblyName>