3.7 support

[AGSPhoenix]

This issue in erequests prevents running eve on Python 3.7 and probably later versions. Once it's fixed, update the requirements.txt file and readme.

[skwzrd]

For anyone wanting to install Python 3.6, you can use this link to save yourself some time https://www.python.org/ftp/python/3.6.8/ . This is the latest version of 3.6 with a provided installer.