Update dependencies from...

Update dependencies from https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int build 20200218.4 (#2603)

- Microsoft.DotNet.Wpf.DncEng - 5.0.0-preview.1.20118.4

eng/Version.Details.xml

@@ -71,9 +71,9 @@
       <Uri>https://github.com/dotnet/corefx</Uri>
       <Sha>8d21b79b924d29088dbde46d42737a657d466b5e</Sha>
     </Dependency>
-    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="5.0.0-preview.1.20118.3">
+    <Dependency Name="Microsoft.DotNet.Wpf.DncEng" Version="5.0.0-preview.1.20118.4">
       <Uri>https://dev.azure.com/dnceng/internal/_git/dotnet-wpf-int</Uri>
-      <Sha>bc90b4b1530dda6252add5bcd34824acf7fe2d0a</Sha>
+      <Sha>1ed6a7e7b669b34170af9d0bd05fce78e18f629d</Sha>
     </Dependency>
     <Dependency Name="System.IO.Packaging" Version="5.0.0-alpha1.19512.1" CoherentParentDependency="Microsoft.Private.Winforms">
       <Uri>https://github.com/dotnet/corefx</Uri>

eng/Versions.props

@@ -97,6 +97,6 @@
     <SystemReflectionMetadataLoadContextPackage>System.Reflection.MetadataLoadContext</SystemReflectionMetadataLoadContextPackage>
   </PropertyGroup>
   <PropertyGroup>
-    <MicrosoftDotNetWpfDncEngVersion>5.0.0-preview.1.20118.3</MicrosoftDotNetWpfDncEngVersion>
+    <MicrosoftDotNetWpfDncEngVersion>5.0.0-preview.1.20118.4</MicrosoftDotNetWpfDncEngVersion>
   </PropertyGroup>
 </Project>