No coverage by default

[brynpickering]

Fixes issue #498

Summary of changes in this pull request:

• Pin pandas < 2.1
• pytest does not collect coverage by default

Reviewer checklist:

• [ ] Test(s) added to cover contribution
• [ ] Documentation updated
• [ ] Changelog updated
• [ ] Coverage maintained or improved

[codecov[bot]]

Codecov Report

Merging #499 (afe27f7) into main (cbed4c8) will decrease coverage by 2.79%. Report is 10 commits behind head on main. The diff coverage is 95.66%.

@@            Coverage Diff             @@
##             main     #499      +/-   ##
==========================================
- Coverage   94.98%   92.20%   -2.79%     
==========================================
  Files          31       32       +1     
  Lines        3890     4016     +126     
  Branches        0      957     +957     
==========================================
+ Hits         3695     3703       +8     
- Misses        195      198       +3     
- Partials        0      115     +115     

Files	Coverage Δ
src/calliope/__init__.py	100.00% <ø> (ø)
src/calliope/_version.py	100.00% <ø> (ø)
src/calliope/backend/helper_functions.py	99.35% <ø> (ø)
src/calliope/backend/where_parser.py	98.55% <100.00%> (ø)
src/calliope/cli.py	81.67% <100.00%> (ø)
src/calliope/core/__init__.py	100.00% <ø> (ø)
src/calliope/core/attrdict.py	99.50% <ø> (ø)
src/calliope/core/io.py	91.75% <100.00%> (ø)
src/calliope/core/model.py	94.05% <100.00%> (ø)
src/calliope/core/util/generate_runs.py	87.09% <ø> (ø)
... and 22 more