Update Mono binaries. Fixes #7124

eng/Versions.props

@@ -144,7 +144,7 @@
     <SystemIdentityModelTokensJwtPackageVersion>5.3.0</SystemIdentityModelTokensJwtPackageVersion>
     <WindowsAzureStoragePackageVersion>8.1.4</WindowsAzureStoragePackageVersion>
     <!-- Dependencies for Blazor. -->
-    <MicrosoftAspNetCoreBlazorMonoPackageVersion>0.8.0-preview-20190125.1</MicrosoftAspNetCoreBlazorMonoPackageVersion>
+    <MicrosoftAspNetCoreBlazorMonoPackageVersion>0.8.0-preview-20190204.1</MicrosoftAspNetCoreBlazorMonoPackageVersion>
     <!-- When updating this, ensure you also update src/Components/Browser.JS/src/package.json to reference the corresponding version of @dotnet/jsinterop -->
     <MonoWebAssemblyInteropPackageVersion>0.8.0-preview1-20181126.4</MonoWebAssemblyInteropPackageVersion>
     <!-- Packages from 2.1/2.2 branches used for site extension build -->