Update API Compat after 1.2 release

[artidoro]

We should update the API Compat tool after the 1.2 release. There are two updates that need to be made.

1. Update the current projects to point to point to the 1.2 nugets
   

   machinelearning/tools-local/Microsoft.ML.StableApi/Microsoft.ML.StableApi.csproj

   Lines 10 to 16 in 78bfecb

   	<PackageReference Include="Microsoft.ML" Version="1.1.0" />
   	<PackageReference Include="Microsoft.ML.DataView" Version="1.1.0" />
   	<PackageReference Include="Microsoft.ML.CpuMath" Version="1.1.0" />
   	<PackageReference Include="Microsoft.ML.FastTree" Version="1.1.0" />
   	<PackageReference Include="Microsoft.ML.LightGbm" Version="1.1.0" />
   	<PackageReference Include="Microsoft.ML.ImageAnalytics" Version="1.1.0" />
   	<PackageReference Include="Microsoft.ML.Mkl.Components" Version="1.1.0" />

2. Activate API Compat on the new stable projects (Onnx, TensorFlow and TimeSeries) and make the stable version point to the 1.2 nugets.