[MRG] FIX: Convert line_freq and overwrite to proper types in CLI

[sappelhoff]

PR Description

fixes #1124

Merge checklist

Maintainer, please confirm the following before merging.
If applicable:

• All comments are resolved
• This is not your own PR
• All CIs are happy
• PR title starts with [MRG]
• whats_new.rst is updated
• New contributors have been added to CITATION.cff
• PR description includes phrase "closes <#issue-number>"

[sappelhoff]

@achilleasNP could you please try whether the changes here fix your problem?

You can install this version using: pip install git+https://github.com/sappelhoff/mne-bids.git@clifix

And then uninstall (pip uninstall mne-bids) after your test and re-install your actual version as you did before.

[codecov]

Codecov Report

Merging #1125 (a01a6f8) into main (0b1a61d) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1125   +/-   ##
=======================================
  Coverage   95.29%   95.29%           
=======================================
  Files          40       40           
  Lines        8670     8676    +6     
=======================================
+ Hits         8262     8268    +6     
  Misses        408      408           

Impacted Files	Coverage Δ
mne_bids/commands/tests/test_cli.py	96.61% <ø> (ø)
mne_bids/commands/mne_bids_raw_to_bids.py	95.45% <100.00%> (+0.71%)	⬆️

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[hoechenberger]

LGTM, but could you add a changelog entry?

[achilleasNP]

@sappelhoff I just tested it and the commit fixes my problem.

Thank you!