fix(package): update mux.js to 5.14.1

[brandonocasey]

Description

See https://github.com/videojs/mux.js/blob/main/CHANGELOG.md#5141-2021-10-14

[codecov]

Codecov Report

Merging #1215 (61aecd7) into main (7420296) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1215      +/-   ##
==========================================
- Coverage   86.35%   86.33%   -0.03%     
==========================================
  Files          39       39              
  Lines        9696     9701       +5     
  Branches     2244     2243       -1     
==========================================
+ Hits         8373     8375       +2     
- Misses       1323     1326       +3     

Impacted Files	Coverage Δ
src/source-updater.js	94.19% <0.00%> (-0.33%)	⬇️
src/transmuxer-worker.js	73.74% <0.00%> (-0.02%)	⬇️

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