Update AdoNet.Specification.Tests.

Author: bgrainger

tests/Conformance.Tests/Conformance.Tests.csproj

@@ -10,7 +10,7 @@
   </PropertyGroup>
 
  <ItemGroup>
-    <PackageReference Include="AdoNet.Specification.Tests" Version="2.0.0-alpha2" />
+    <PackageReference Include="AdoNet.Specification.Tests" Version="2.0.0-alpha3" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="15.3.0" />
     <PackageReference Include="xunit" Version="2.4.1" />
     <PackageReference Include="xunit.runner.visualstudio" Version="2.4.1" />