[release/3.1] Update dependencies from dotnet/winforms (#2142)

* Update dependencies from https://github.com/dotnet/winforms build 20191031.2

- Microsoft.Private.Winforms - 4.8.1-preview1.19531.2

* Update dependencies from https://github.com/dotnet/winforms build 20191031.3

- Microsoft.Private.Winforms - 4.8.1-preview1.19531.3

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-preview1.19529.13">
+    <Dependency Name="Microsoft.Private.Winforms" Version="4.8.1-preview1.19531.3">
       <Uri>https://github.com/dotnet/winforms</Uri>
-      <Sha>4378c8fec85e3ad09065870d387a48d11320e95c</Sha>
+      <Sha>87db52011e8fb53ab15d1a33f3f4e721552b1ef9</Sha>
     </Dependency>
   </ProductDependencies>
   <ToolsetDependencies>

eng/Versions.props

@@ -10,7 +10,7 @@
   </PropertyGroup>
   <!-- NuGet Package Versions -->
   <PropertyGroup>
-    <MicrosoftPrivateWinformsVersion>4.8.1-preview1.19529.13</MicrosoftPrivateWinformsVersion>
+    <MicrosoftPrivateWinformsVersion>4.8.1-preview1.19531.3</MicrosoftPrivateWinformsVersion>
   </PropertyGroup>
   <!-- Packages that come from https://github.com/dotnet/coreclr -->
   <PropertyGroup>