Initial Update (#32)

* Pin sphinx to latest version 1.4.6

* Pin pytest-cov to latest version 2.3.1

* Pin flake8 to latest version 3.0.4

* Pin pytest to latest version 3.0.2

* Pin coverage to latest version 4.2

* Pin aiohttp to latest version 1.0.2

* Pin jinja2 to latest version 2.8

Author: pyup.io bot