Update dependencies from...

Update dependencies from https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int build 20190606.4 (#893)

- Microsoft.DotNet.Wpf.DncEng - 4.8.0-preview7.19306.4

eng/Version.Details.xml

@@ -75,9 +75,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>bdbdfaa286b94c44fadb2abd64e858b2e533a2cf</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.0-preview7.19305.10">
+    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.0-preview7.19306.4">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int</Uri>
-      <Sha>76e5819b43718069ef5710a08032b616de5d754c</Sha>
+      <Sha>8bce9d3c8edec5caa03e272b9bed4fa143a0b6bf</Sha>
     </Dependency>
     <Dependency Name="System.IO.Packaging" Version="4.6.0-preview7.19306.6" CoherentParentDependency="Microsoft.NETCore.App">
       <Uri>https://github.com/dotnet/corefx</Uri>

eng/Versions.props

@@ -103,6 +103,6 @@
       It is worth reiterating that this package *should not* be consumed to build the product.
   -->
   <PropertyGroup>
-    <MicrosoftDotNetWpfDncEngVersion>4.8.0-preview7.19305.10</MicrosoftDotNetWpfDncEngVersion>
+    <MicrosoftDotNetWpfDncEngVersion>4.8.0-preview7.19306.4</MicrosoftDotNetWpfDncEngVersion>
   </PropertyGroup>
 </Project>