Update and fix dependencies.

NuGet.Config

@@ -2,6 +2,6 @@
 <configuration>
   <packageSources>
     <add key="nuget.org" value="https://api.nuget.org/v3/index.json" />
-    <add key="dotnet-core (nightly)" value="https://dotnetfeed.blob.core.windows.net/dotnet-core/index.json" />
+    <add key="dotnet-core (nightly)" value="https://dnceng.pkgs.visualstudio.com/public/_packaging/dotnet5/nuget/v3/index.json" />
   </packageSources>
 </configuration>

build/dependencies.props

@@ -10,9 +10,9 @@
     <MicrosoftExtensionsLoggingVersion>3.1.2</MicrosoftExtensionsLoggingVersion>
     <SystemDiagnosticsDiagnosticSourceVersion>4.7.0</SystemDiagnosticsDiagnosticSourceVersion>
     <MicrosoftBclAsyncInterfacesVersion>1.1.0</MicrosoftBclAsyncInterfacesVersion>
-    <MicrosoftBclHashCodeVersion>MicrosoftBclHashCodeVersion</MicrosoftBclHashCodeVersion>
+    <MicrosoftBclHashCodeVersion>1.1.0</MicrosoftBclHashCodeVersion>
     <SystemCollectionsImmutableVersion>1.7.0</SystemCollectionsImmutableVersion>
     <SystemComponentModelAnnotationsVersion>4.7.0</SystemComponentModelAnnotationsVersion>
-    <SystemDataOleDbVersion>4.7.0</SystemDataOleDbVersion>
+    <SystemDataOleDbVersion>5.0.0-preview.3.20160.5</SystemDataOleDbVersion>
   </PropertyGroup>
 </Project>