Update pkg versions

Author: jburnett

test/test.csproj

@@ -15,10 +15,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0-preview-20170106-08" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.2.0-beta5-build1225" />
-    <PackageReference Include="xunit" Version="2.2.0-beta5-build3474" />
-    <PackageReference Include="FluentAssertions" Version="4.9.0.*" />
+    <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.0.0" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.2.*" />
+    <PackageReference Include="xunit" Version="2.2.*" />
+    <PackageReference Include="FluentAssertions" Version="4.19.*" />
   </ItemGroup>
 
 </Project>