Adding some config for coverage

[bsipocz]

Maybe this will help to lessen the annoying coverage report flukes

[codecov]

Codecov Report

Merging #2201 (1cdd0ce) into main (bc722c9) will decrease coverage by 4.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2201      +/-   ##
==========================================
- Coverage   66.11%   61.81%   -4.31%     
==========================================
  Files         418      129     -289     
  Lines       28180    16285   -11895     
==========================================
- Hits        18631    10066    -8565     
+ Misses       9549     6219    -3330     

Impacted Files	Coverage Δ
astroquery/utils/tests/test_timer.py
astroquery/fermi/tests/test_fermi.py
astroquery/imcce/tests/test_skybot.py
astroquery/ipac/irsa/sha/__init__.py
astroquery/vamdc/tests/setup_package.py
astroquery/esa/xmm_newton/__init__.py
astroquery/__init__.py
astroquery/lamda/__init__.py
astroquery/esa/iso/tests/__init__.py
astroquery/ipac/ned/__init__.py
... and 279 more

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[bsipocz]

@pllim - could you spot any reasons why e.g. astroquery/simbad/tests/test_simbad.py wasn't skipped by this config? The same syntax seems to work for astropy.

[pllim]

You might need to copy or move the conftest.py file to root level. Right now, it is under astroquery package folder.

[bsipocz]

OK, so the config file has to be actually specified in the tox line. The full report now looks OK, I'm not sure why the comment is still messy, but hopefully, it will converge to something sensible once this is merged.