Log Message:
py-cython: updated to 0.29.11

0.29.11:

Bugs fixed

* Fix compile error in CPython 3.8b2.

* Invalid C code generated for lambda functions in cdef methods.

* Support slice handling in newer Pythran versions.

* A reference leak in power-of-2 calculation was fixed.

* The search order for include files was changed. Previously it was
  include_directories, Cython/Includes, sys.path. Now it is
  include_directories, sys.path, Cython/Includes. This was done to
  allow third-party *.pxd files to override the ones in Cython.
  Original patch by Matti Picus.

* Setting language_level=2 in a file did not work if language_level=3
  was enabled globally before.