Assert.AreEqual breaks with MSTest v3

[igitur]

Hi,

When upgrading my test project to MSTest 3.0.2 I noticed some tests failing. I think there was a breaking change in microsoft/testfx#1433 . From what I can gather, mstest-extensions is still source compatible, but I suspect there's been a break in binary compatibility. If so, this should require a rebuild and rerelease of the NuGet package, right?

Here is a sample case:

<!-- .csproj file -->
<Project Sdk="Microsoft.NET.Sdk">

	<PropertyGroup>
		<TargetFramework>net462</TargetFramework>
	</PropertyGroup>

	<ItemGroup>
		<PackageReference Include="Microsoft.UnitTestFramework.Extensions" Version="2.0.0" />
		<PackageReference Include="MSTest.TestFramework" Version="3.0.1" />
		<PackageReference Include="MSTest.TestAdapter" Version="3.0.1" />
	</ItemGroup>

</Project>

[TestMethod]
public void TestObjectEquality()
{
    var target = new UnitTest();

    var assert = target.Assert;

    assert.AreEqual((object)5, (object)5);
}

The test output is:

 TestObjectEquality
   Source: UnitTest1.cs line 7
   Duration: 141 ms

  Message: 
Test method UnitTestTest.TestObjectEquality threw exception: 
System.MissingMethodException: Method not found: 'Void Microsoft.VisualStudio.TestTools.UnitTesting.Assert.AreEqual(System.Object, System.Object)'.

  Stack Trace: 
UnitTestTest.TestObjectEquality() line 14