Log Message:
py-cython: updated to 0.29.1

0.29.1:

Bugs fixed
----------

* Extensions compiled with MinGW-64 under Windows could misinterpret integer
  objects larger than 15 bit and return incorrect results.

* Cython no longer requires the source to be writable when copying its data
  into a memory view slice.

* Line tracing of try-statements generated invalid C code.

* When using the warn.undeclared directive, Cython's own code generated
  warnings that are now fixed.

* Cython's memoryviews no longer require strides for setting the shape field
  but only the PyBUF_ND flag to be set.

* Some C compiler warnings about unused memoryview code were fixed.

* A C compiler warning about implicit signed/unsigned conversion was fixed.

* Assignments to C++ references returned by operator[] could fail to compile.

* The power operator and the support for NumPy math functions were fixed
  in Pythran expressions.

* Signatures with memory view arguments now show the expected type
  when embedded in docstrings.

* Some from ... cimport ... constructs were not correctly considered
  when searching modified dependencies in cythonize() to decide
  whether to recompile a module.

* A struct field type in the cpython.array declarations was corrected.
  Patch by John Kirkham.