Update dependencies from https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int build 20190723.7 (#1356)

- Microsoft.DotNet.Wpf.DncEng - 4.8.0-preview8.19373.7

Author: dotnet-maestro[bot]

eng/Version.Details.xml

@@ -75,9 +75,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>d594cb2dbc5027d7e996491b0722c5be5204460f</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.0-preview8.19372.8">
+    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="4.8.0-preview8.19373.7">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int</Uri>
-      <Sha>c6d123f52fe7f4e5c166d5b910dd1d0dc2c5bf3d</Sha>
+      <Sha>8aa486183ae5b8f8312fcec110932ca095fd1478</Sha>
     </Dependency>
     <Dependency Name="System.IO.Packaging" Version="4.6.0-preview8.19372.8" CoherentParentDependency="Microsoft.NETCore.App">
       <Uri>https://github.com/dotnet/corefx</Uri>

eng/Versions.props

@@ -107,6 +107,6 @@
       It is worth reiterating that this package *should not* be consumed to build the product.
   -->
   <PropertyGroup>
-    <MicrosoftDotNetWpfDncEngVersion>4.8.0-preview8.19372.8</MicrosoftDotNetWpfDncEngVersion>
+    <MicrosoftDotNetWpfDncEngVersion>4.8.0-preview8.19373.7</MicrosoftDotNetWpfDncEngVersion>
   </PropertyGroup>
 </Project>