Update neo4j-driver

[nathanweeks]

$ grep neo4j-driver requirements.txt 
neo4j-driver==1.5.3

Could neo4j-driver be bumped to at least 1.7.6? I see this error using Python 3.8.x:

Error: While importing "server.dscensor", an ImportError was raised:

Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/flask/cli.py", line 240, in locate_app
    __import__(module_name)
  File "/app/dscensor/server/dscensor.py", line 12, in <module>
    from client.templating import neo4j_dscensor_linkout
  File "/app/dscensor/client/templating/neo4j_dscensor_linkout.py", line 11, in <module>
    from neo4j.v1 import GraphDatabase, basic_auth
  File "/usr/local/lib/python3.8/site-packages/neo4j/v1/__init__.py", line 22, in <module>
    from .direct import *
  File "/usr/local/lib/python3.8/site-packages/neo4j/v1/direct.py", line 23, in <module>
    from neo4j.bolt.connection import DEFAULT_PORT, ConnectionPool, connect, ConnectionErrorHandler
  File "/usr/local/lib/python3.8/site-packages/neo4j/bolt/__init__.py", line 23, in <module>
    from .connection import *
  File "/usr/local/lib/python3.8/site-packages/neo4j/bolt/connection.py", line 44, in <module>
    from time import clock
ImportError: cannot import name 'clock' from 'time' (unknown location)

time.clock was deprecated in Python 3.3, and removed in Python 3.8

If the answer is "use Python <= 3.7 for now", that's fine too :-)