Installing 4.2.0 installs the wrong version of python-http-client

[w-]

Issue Summary

If I install 4.2.0 via pip, it install python-http-client==2.3.0
We should be getting 2.2.1

This breaks things if we are doing error handling using HTTPError from urllib.

Steps to Reproduce

$ pip install sendgrid==4.2.0
Collecting sendgrid==4.2.0
  Using cached sendgrid-4.2.0-py2.py3-none-any.whl
Collecting python-http-client>=2.1.1 (from sendgrid==4.2.0)
  Using cached python_http_client-2.3.0-py2.py3-none-any.whl
Installing collected packages: python-http-client, sendgrid
Successfully installed python-http-client-2.3.0 sendgrid-4.2.0

Technical details:

python 2.7.13
pip 9.0.1

Workaround

FYI if we preinstall 2.2.1 it seems to be ok

$ pip install sendgrid==4.2.0
Collecting sendgrid==4.2.0
  Using cached sendgrid-4.2.0-py2.py3-none-any.whl
Requirement already satisfied: python-http-client>=2.1.1 in ./py_venvs/gfy/lib/python2.7/site-packages (from sendgrid==4.2.0)
Installing collected packages: sendgrid
Successfully installed sendgrid-4.2.0

[thinkingserious]

Thanks for the heads up @w-!

I've added this to our backlog for a fix.

[thinkingserious]

Fixed with version 4.2.1