some unit tests now fail since merging PR #67

[irmen]

Since merging PR #67 four unit tests now fail @adamsitnik I'll have a quick look myself too

Seems all 4 fails are caused by something that broke that now incorrectly unpickles into an arraylist where it had to be a hashset.

I think

Pyrolite/dotnet/Razorvine.Pyrolite/Tests/Pickle/PicklerTests.cs

Line 175 in 8fcb517

public void TestSets()

is the important one here and that will likely fix the other errors as well.

See https://travis-ci.org/irmen/Pyrolite/jobs/532987059

edit: actually managed to get the Travis CI build running with BOTH Java AND Dotnet unit tests this time (was only doing Java before)