Allow travis build for Py3.7 final to fail as long as it's not available. :)
Allow travis build for Py3.7 final to fail as long as it's not available. :)

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