Update dependencies
Updated python deps:
- boto3 1.7.64->1.7.77
- botocore 1.10.64->1.10.77
- certifi 2018.4.16->2018.8.13
- cryptography 2.3->2.3.1
- Django 2.0.7->2.1.2
- elasticsearch 6.3.0->6.3.1
- google-auth 1.5.0->1.5.1
- pyasn1 0.4.3->0.4.4
- pytest 3.6.3->3.7.1
- pytest-django 3.3.2->3.3.3