Django-ethereum-events

Changes:

- Fixed typo in env name

Breaking change

Removed (merged) settings:
- ETHEREUM_NODE_HOST
- ETHEREUM_NODE_PORT
- ETHEREUM_NODE_SSL

To setting:

- ETHEREUM_NODE_URI

For example:


ETHEREUM_NODE_URI = 'http://localhost:8545'

**Breaking changes**

- Updated package to be compatible with **web3 4.9.x** version
- Removed support for **python 3.5**
- Added support for **python 3.7**

**Changes**:

- Pinned ``eth-keys`` version to ``0.2.0b3`` to fix error due to fresh package install

Added Django 2.1 support.

Added a pending migration