Setup black, isort, and pyupgrade

[jcpunk]

This PR is a two stage PR, setup the hooks and then run them.

[codecov]

Codecov Report

Merging #444 (8e1de84) into master (3800cc2) will increase coverage by 0.02%.
The diff coverage is 96.08%.

@@            Coverage Diff             @@
##           master     #444      +/-   ##
==========================================
+ Coverage   93.84%   93.86%   +0.02%     
==========================================
  Files          44       44              
  Lines        2761     2754       -7     
  Branches      391      391              
==========================================
- Hits         2591     2585       -6     
  Misses        129      129              
+ Partials       41       40       -1     

Flag	Coverage Δ
python-3.6	93.26% <94.51%> (-0.02%)	⬇️
python-3.9	93.38% <94.77%> (+0.01%)	⬆️
python-pypy-3.7	93.40% <95.56%> (+0.05%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
src/decisionengine/framework/logicengine/Rule.py	100.00% <ø> (ø)
src/decisionengine/framework/util/subclasses.py	100.00% <ø> (ø)
...rc/decisionengine/framework/modules/SourceProxy.py	65.71% <68.75%> (ø)
.../decisionengine/framework/engine/DecisionEngine.py	90.19% <91.93%> (ø)
...gine/framework/dataspace/datasources/postgresql.py	82.44% <92.72%> (ø)
src/decisionengine/framework/engine/de_client.py	94.78% <96.66%> (ø)
src/decisionengine/framework/about.py	100.00% <100.00%> (ø)
...ionengine/framework/config/ChannelConfigHandler.py	95.94% <100.00%> (ø)
src/decisionengine/framework/config/ValidConfig.py	95.34% <100.00%> (ø)
src/decisionengine/framework/config/policies.py	100.00% <100.00%> (ø)
... and 30 more

---

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[knoepfel]

Pat, thanks so much for spear-heading this.

[jcpunk]

As a reminder, you'll want to setup pre-commit on your dev box once this gets merged to take full advantage :
For more information see

• https://pre-commit.com/index.html#install
• https://pre-commit.com/index.html#automatically-enabling-pre-commit-on-repositories

[jcpunk]

I just added a few manual corrections to things that probably don't matter and wont bug anyone but me (mostly consistent use of @pytest.fixture() vs @pytest.fixture)