Update dependencies from https://github.com/dotnet/winforms build 20200209.3 (#2538)

- Microsoft.Private.Winforms - 5.0.0-preview.1.20109.3

eng/Version.Details.xml

 <?xml version="1.0" encoding="utf-8"?>
 <Dependencies>
   <ProductDependencies>
-    <Dependency Name="Microsoft.Private.Winforms" Version="5.0.0-preview.1.20109.2">
+    <Dependency Name="Microsoft.Private.Winforms" Version="5.0.0-preview.1.20109.3">
       <Uri>https://github.com/dotnet/winforms</Uri>
-      <Sha>c5f7dd1365d90f3021d54218cce809cfaee74c9b</Sha>
+      <Sha>5bd006cc675cfa378cff76dcc3e44e6c627cbed7</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>

eng/Versions.props

@@ -9,7 +9,7 @@
   </PropertyGroup>
   <!-- NuGet Package Versions -->
   <PropertyGroup>
-    <MicrosoftPrivateWinformsVersion>5.0.0-preview.1.20109.2</MicrosoftPrivateWinformsVersion>
+    <MicrosoftPrivateWinformsVersion>5.0.0-preview.1.20109.3</MicrosoftPrivateWinformsVersion>
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/coreclr -->
   <PropertyGroup>