[ENH] allow for .png and .tif in eeg/ieeg/meg as allowed for micr

[yarikoptic]

Discovered while working on #1047

I guess it could be argued against but I feel that such unification makes sense. There might be other common suffixes where we might want to introduce similar unification.

• validator support implemented: rules: add png and tif to [i|m]eeg bids-validator#1443

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.50%. Comparing base (7ec7450) to head (280074a).
Report is 1435 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #1049      +/-   ##
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+ Coverage   70.53%   71.50%   +0.96%     
==========================================
  Files           9        9              
  Lines         930      930              
==========================================
+ Hits          656      665       +9     
+ Misses        274      265       -9     

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[sappelhoff]

I don't really remember why this was restricted to JPG to begin with. Probably to limit the amount of possible extensions ... as we also did with e.g., EEG file formats.

I don't think the suggestion here would hurt anyone.

[effigies]

Might be good to check in with all the *EG BEP leads.

[robertoostenveld]

I think this makes sense, also for consistency.

[Remi-Gau]

makes sense to me too

[sappelhoff]

we'd need to open an associated PR to the validator to expand the regex rules, for example here: https://github.com/bids-standard/bids-validator/blob/9c27673c4f35a2b364d09f381149dc34f6c3e12c/bids-validator/bids_validator/rules/file_level_rules.json#L380

[tsalo]

From the schema's perspective, this looks good to me. I leave it up to others to approve the content change.

[effigies]

Looks like lots of approval and no dissent. I agree that there doesn't seem to be much benefit in keeping this restricted, as all proposed formats are well-supported (though TIFF is more a container than a codec, I think we can assume people aren't doing really wild things with it).

[effigies]

15 days since last change, 7 days since 2 approvals, no objections since then. Merging.