WinRTC: Upgrade target to Fall Creators Update

The old target imposes a 2GB download and with Win10 there is less
reason to keep supporting older versions.

Author: angularsen

UnitsNet/UnitsNet.WindowsRuntimeComponent.csproj

@@ -11,7 +11,7 @@
     <AssemblyName>UnitsNet</AssemblyName>
     <DefaultLanguage>en-US</DefaultLanguage>
     <TargetPlatformIdentifier>UAP</TargetPlatformIdentifier>
-    <TargetPlatformVersion Condition=" '$(TargetPlatformVersion)' == '' ">10.0.15063.0</TargetPlatformVersion>
+    <TargetPlatformVersion Condition=" '$(TargetPlatformVersion)' == '' ">10.0.16299.0</TargetPlatformVersion>
     <TargetPlatformMinVersion>10.0.10586.0</TargetPlatformMinVersion>
     <MinimumVisualStudioVersion>14</MinimumVisualStudioVersion>
     <FileAlignment>512</FileAlignment>