Update to OCMock 3.4.1
Update to OCMock 3.4.1

Fixes a crash when running tests in Xcode 9.

thoughtbot/Tropos,thoughtbot/Tropos,faimin/Tropos,faimin/Tropos,andreamazz/Tropos,faimin/Tropos,thoughtbot/Tropos,andreamazz/Tropos,andreamazz/Tropos