Dependencies: drop support for Python 3.7

[sphuber]

Fixes #5306

Following AEP 003, which follows NEP 029, support for Python 3.7 is
dropped as of December 26 2021.

[codecov]

Codecov Report

Merging #5307 (47db0be) into develop (afebb6e) will increase coverage by 0.39%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #5307      +/-   ##
===========================================
+ Coverage    81.51%   81.90%   +0.39%     
===========================================
  Files          530      530              
  Lines        37105    38009     +904     
===========================================
+ Hits         30242    31127     +885     
- Misses        6863     6882      +19     

Flag	Coverage Δ
django	77.47% <ø> (+0.50%)	⬆️
sqlalchemy	76.21% <ø> (+0.27%)	⬆️

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

Impacted Files	Coverage Δ
aiida/tools/archive/implementations/sqlite/main.py	87.18% <0.00%> (-5.12%)	⬇️
aiida/orm/implementation/querybuilder.py	90.20% <0.00%> (-3.92%)	⬇️
aiida/orm/nodes/data/jsonable.py	95.32% <0.00%> (-3.12%)	⬇️
aiida/orm/implementation/groups.py	77.03% <0.00%> (-2.70%)	⬇️
aiida/common/lang.py	78.58% <0.00%> (-1.91%)	⬇️
aiida/tools/archive/abstract.py	85.15% <0.00%> (-1.85%)	⬇️
...ida/tools/archive/implementations/sqlite/writer.py	89.51% <0.00%> (-1.10%)	⬇️
...m/implementation/sqlalchemy/querybuilder/joiner.py	90.22% <0.00%> (-1.08%)	⬇️
aiida/orm/entities.py	95.74% <0.00%> (-0.93%)	⬇️
aiida/tools/archive/imports.py	91.33% <0.00%> (-0.39%)	⬇️
... and 184 more

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[csadorf]

@sphuber Was it already investigated why the test-install:tests are now failing?

[csadorf]

Changes look fine to me however the tests are failing.

[sphuber]

I was looking into it, and it doesn't seem to have anything to do with this PR because #5303 is failing for the same reasons. I have no idea yet why this should be failing now.

[sphuber]

It looks like pytest-asyncio==0.17.0 is now getting installed instead of pytest-asyncio==0.16.0, so it seems likely it has to do with this. Will try to pin and see if that fixes it.

[sphuber]

pytest-asyncio v0.17 was released 3 hours ago ... https://pypi.org/project/pytest-asyncio/

[csadorf]

pytest-asyncio v0.17 was released 3 hours ago ... https://pypi.org/project/pytest-asyncio/

[sphuber]

@csadorf added temporary fix in #5309 . Opened issue #5310 for a more long term solution as it is not immediately obvious how to solve this for all versions