fix(windows): ensure target platform version match (#2648)

Author: tido64

packages/app/windows/Win32/ReactApp.Package.wapproj

@@ -3,6 +3,7 @@
   <Import Project="$(SolutionDir)\ExperimentalFeatures.props" Condition="Exists('$(SolutionDir)\ExperimentalFeatures.props')" />
   <PropertyGroup>
     <ProjectGuid>{b44cead7-fbff-4a17-95eb-ff5434bbd79d}</ProjectGuid>
+    <TargetPlatformVersion Condition="'$(WindowsTargetPlatformVersion)'!=''">$(WindowsTargetPlatformVersion)</TargetPlatformVersion>
     <DefaultLanguage>en-US</DefaultLanguage>
     <EntryPointProjectUniqueName>ReactApp.vcxproj</EntryPointProjectUniqueName>
     <DebuggerType>NativeOnly</DebuggerType>

packages/app/windows/Win32/ReactApp.vcxproj

@@ -8,7 +8,6 @@
     <ProjectName>ReactApp</ProjectName>
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>ReactApp</RootNamespace>
-    <WindowsTargetPlatformVersion>10.0</WindowsTargetPlatformVersion>
     <DefaultLanguage>en-US</DefaultLanguage>
     <MinimumVisualStudioVersion>17.0</MinimumVisualStudioVersion>
     <AppxPackage>false</AppxPackage>