Update dependencies from https://github.com/aspnet/AspNetCore-Tooling build 20191001.1 (dotnet#3019)

- Microsoft.NET.Sdk.Razor - 3.1.0-preview1.19501.1

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -25,9 +25,9 @@
       <Uri>https://github.com/dotnet/roslyn</Uri>
       <Sha>38c90f8401f9e3ee5fb7c82aac36f6b85fdda979</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.NET.Sdk.Razor" Version="3.1.0-preview2.19480.5">
+    <Dependency Name="Microsoft.NET.Sdk.Razor" Version="3.1.0-preview1.19501.1">
       <Uri>https://github.com/aspnet/AspNetCore-Tooling</Uri>
-      <Sha>49542e048847cc37de13ed583e45b86f7d4a25a3</Sha>
+      <Sha>1e85487b5011a3541c78be97baa4407abf87ea1a</Sha>
     </Dependency>
     <!-- For coherency purposes, this version should be gated by the version of wpf routed via core setup -->
     <Dependency Name="Microsoft.NET.Sdk.WindowsDesktop" Version="3.1.0-preview1.19476.4" CoherentParentDependency="Microsoft.NETCore.App.Runtime.win-x64">

eng/Versions.props

@@ -37,7 +37,7 @@
   </PropertyGroup>
   <PropertyGroup>
     <!-- Dependencies from https://github.com/aspnet/AspNetCore-Tooling -->
-    <MicrosoftNETSdkRazorPackageVersion>3.1.0-preview2.19480.5</MicrosoftNETSdkRazorPackageVersion>
+    <MicrosoftNETSdkRazorPackageVersion>3.1.0-preview1.19501.1</MicrosoftNETSdkRazorPackageVersion>
   </PropertyGroup>
   <PropertyGroup>
     <!-- Dependencies from https://github.com/aspnet/websdk -->