runs test on main branch as well.

[laixintao]

reasons:

• tests passed on PR branches do not mean they will pass on main branch, for e.g. alice changed A in branch-a, bob changed B in branch-b, both tests passed and no conflict, but after merged to main, a bug occurs.
• wanna fix the badge in main branch ;D

Description

Checklist

• I've added this contribution to the changelog.rst.
• I've added my name to the AUTHORS file (or it's already there).

• I installed pre-commit hooks (pip install pre-commit && pre-commit install), and ran black on my code.
• Please squash merge this pull request (uncheck if you'd like us to merge as multiple commits)

[codecov-commenter]

Codecov Report

Attention: 237 lines in your changes are missing coverage. Please review.

Comparison is base (6884c29) 84.15% compared to head (3545fc9) 79.53%.
Report is 71 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1429      +/-   ##
==========================================
- Coverage   84.15%   79.53%   -4.62%     
==========================================
  Files          21       25       +4     
  Lines        2720     3030     +310     
==========================================
+ Hits         2289     2410     +121     
- Misses        431      620     +189     

Files	Coverage Δ
pgcli/__init__.py	100.00% <100.00%> (ø)
pgcli/completion_refresher.py	91.76% <ø> (+1.17%)	⬆️
pgcli/packages/parseutils/__init__.py	100.00% <100.00%> (ø)
pgcli/packages/parseutils/tables.py	97.67% <ø> (ø)
pgcli/packages/prompt_utils.py	70.00% <100.00%> (+5.29%)	⬆️
pgcli/packages/sqlcompletion.py	97.67% <ø> (ø)
pgcli/pgstyle.py	64.00% <ø> (ø)
pgcli/magic.py	0.00% <0.00%> (ø)
pgcli/auth.py	91.30% <91.30%> (ø)
pgcli/key_bindings.py	52.94% <66.66%> (-0.19%)	⬇️
... and 8 more

... and 1 file with indirect coverage changes

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[j-bennet]

Thank you @laixintao .