Sets the minimum supported version to 17763 (#165)

This ensures the assembly attribute gets sets to the actual lowest version WinUI supports instead of the default pulled from the Target Framework (ie 10.0.22621.0)

Author: dotMorten

src/Reactor/Reactor.csproj

@@ -12,6 +12,8 @@
     <!-- Override Directory.Build.props (true) — this library should not bundle
          the WinUI runtime; the consuming executable controls self-containedness. -->
     <WindowsAppSDKSelfContained>false</WindowsAppSDKSelfContained>
+    <TargetPlatformMinVersion>10.0.17763.0</TargetPlatformMinVersion>
+    <SupportedOSPlatformVersion>10.0.17763.0</SupportedOSPlatformVersion>
   </PropertyGroup>
 
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