Update dependencies from https://github.com/dotnet/winforms build 20191114.3 (#2192)

- Microsoft.Private.Winforms - 4.8.1-rtm.19564.3

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -1,9 +1,9 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.Private.Winforms" Version="4.8.1-preview1.19557.8">
+    <Dependency Name="Microsoft.Private.Winforms" Version="4.8.1-rtm.19564.3">
       <Uri>https://github.com/dotnet/winforms</Uri>
-      <Sha>922e41002e66fb10d703705d9be700c8b30cd63d</Sha>
+      <Sha>9fb9388f954d929d9f6213096fca6abdd99716e5</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>

eng/Versions.props

@@ -10,7 +10,7 @@
   </PropertyGroup>
   <!-- NuGet Package Versions -->
   <PropertyGroup>
-    <MicrosoftPrivateWinformsVersion>4.8.1-preview1.19557.8</MicrosoftPrivateWinformsVersion>
+    <MicrosoftPrivateWinformsVersion>4.8.1-rtm.19564.3</MicrosoftPrivateWinformsVersion>
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/coreclr -->
   <PropertyGroup>