create modality-specific file extension check

[olgn]

fixes #704.

Incorporates new file extension check function - bids-validator/utils/files/type.js:file.hasModality. This function is more accurate than the previously implemented bids-validator/utils/files/type.js:file.isDataFile for obtaining modalities from file extensions.

[codecov]

Codecov Report

Merging #745 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #745      +/-   ##
==========================================
+ Coverage   87.05%   87.05%   +<.01%     
==========================================
  Files          75       75              
  Lines        2147     2148       +1     
  Branches      395      395              
==========================================
+ Hits         1869     1870       +1     
  Misses        236      236              
  Partials       42       42

Impacted Files	Coverage Δ
bids-validator/utils/summary/collectModalities.js	100% <100%> (ø)	⬆️
bids-validator/utils/type.js	100% <100%> (ø)	⬆️

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[codecov]

Codecov Report

Merging #745 into master will increase coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #745      +/-   ##
==========================================
+ Coverage   87.05%   87.05%   +<.01%     
==========================================
  Files          75       75              
  Lines        2147     2148       +1     
  Branches      395      395              
==========================================
+ Hits         1869     1870       +1     
  Misses        236      236              
  Partials       42       42

Impacted Files	Coverage Δ
bids-validator/utils/summary/collectModalities.js	100% <100%> (ø)	⬆️
bids-validator/utils/type.js	100% <100%> (ø)	⬆️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 74a31c8...bf9bb5a. Read the comment docs.