Log Message:
py-cython: updated to 0.27.2

0.27.2:

Bugs fixed
----------
* Comprehensions could incorrectly be optimised away when they appeared in boolean
  test contexts.
* The special methods ``__eq__``, ``__lt__`` etc. in extension types did not type
  their first argument as the type of the class but ``object``.
* Crash on first lookup of "cline_in_traceback" option during \ 
exception handling.
* Some nested module level comprehensions failed to compile.
* Compiler crash on some complex type declarations in pure mode.
* ``std::unordered_map.erase()`` was declared with an incorrect ``void`` return
  type in ``libcpp.unordered_map``.
* Invalid use of C++ ``fallthrough`` attribute before C++11 and similar issue in \ 
clang.
* Compiler crash on misnamed properties.