Prepare release of 0.29.19.
Prepare release of 0.29.19.

cython/cython,cython/cython,da-woods/cython,scoder/cython,scoder/cython,da-woods/cython,cython/cython,cython/cython,scoder/cython,da-woods/cython,da-woods/cython,scoder/cython