Declare 1.9.0

Declare v1.8.3

Declare v1.8.2

This is a maintenance release -- various improvements to the tests,
docs & development setup.

Declare v1.8.1

Declare v1.8

Declare v1.7.1

Declare v1.7

Declare v1.6

Declare v1.5

The main changes since 1.4.4 are:
 - upgrading syntax to use newer language features
 - dropping pylint, upgrading other linters
 - better error messages when out of time
 - new Python API to get scores for a given match
 - raw compstate now uses yaml.safe_load in more cases
 - testing on Python 3.10
 - improved internal testing utils

Patch version for small setup.py fixes