Targeting latest SDK (currently this project requires separate 10.0.10240.0 SDK download)

(cherry picked from commit c47c1e0a0b6e2ed4d9fa6e8fa04aca5d45bbb4bd)

Source commit: 10a07e2ac2f4272862c11f139b0f4e612f5a0f4b

libs/puttyvs/PuTTYVS.vcxproj

@@ -14,6 +14,7 @@
     <ProjectGuid>{72E46F2A-361D-490E-B8A2-C5CD8D56C3A6}</ProjectGuid>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>PuTTYVS</RootNamespace>
+    <WindowsTargetPlatformVersion>10.0.18362.0</WindowsTargetPlatformVersion>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">