v1.7.3

• Add setuptools 42.0.1, remove setuptools 41.6.0
  for stack(s) cflinuxfs3
  (https://www.pivotaltracker.com/story/show/169949301)
  (https://www.pivotaltracker.com/story/show/169936104)

Packaged binaries:

name	version	cf_stacks
libffi	3.2.1	cflinuxfs3
libmemcache	1.0.18	cflinuxfs3
miniconda2	4.7.12.1	cflinuxfs3
miniconda3	4.7.12.1	cflinuxfs3
pip-pop	0.1.4	cflinuxfs3
pipenv	2018.11.26	cflinuxfs3
python	2.7.16	cflinuxfs3
python	2.7.17	cflinuxfs3
python	3.4.9	cflinuxfs3
python	3.4.10	cflinuxfs3
python	3.5.7	cflinuxfs3
python	3.5.9	cflinuxfs3
python	3.6.8	cflinuxfs3
python	3.6.9	cflinuxfs3
python	3.7.4	cflinuxfs3
python	3.7.5	cflinuxfs3
python	3.8.0	cflinuxfs3
setuptools	42.0.1	cflinuxfs3

Default binary versions:

name	version
python	2.7.x

• Uncached buildpack SHA256: d4faa2227eca3fbf2ce5bc02b489b645c533fda26912bdc12636a267291ab3a8