Bump up version 2.4.0

Author: rickyah

src/IniFileParser/Properties/AssemblyInfo.cs

@@ -30,5 +30,5 @@
 //
 // You can specify all the values or you can default the Revision and Build Numbers 
 // by using the '*' as shown below:
-[assembly: AssemblyVersion("2.3.0")]
-[assembly: AssemblyFileVersion("2.3.0")]
+[assembly: AssemblyVersion("2.4.0")]
+[assembly: AssemblyFileVersion("2.4.0")]