build(Core/Directory.Build.props): 更新项目版本号从1.3.9到1.4.0

Author: mudtools

Core/Directory.Build.props

@@ -1,7 +1,7 @@
 <Project>
 	<PropertyGroup>
 		<TargetFrameworks>netstandard2.0</TargetFrameworks>
-		<Version>1.3.9</Version>
+		<Version>1.4.0</Version>
 		<ImplicitUsings>enable</ImplicitUsings>
 		<Nullable>enable</Nullable>
 		<TreatWarningsAsErrors>false</TreatWarningsAsErrors>