CompatHelper: bump compat for BioSequences to 3, (keep existing compat)

[github-actions[bot]]

This pull request changes the compat entry for the BioSequences package from 2 to 2, 3. This keeps the compat entries for earlier versions.

Note: I have not tested your package with this new compat entry. It is your responsibility to make sure that your package tests pass before you merge this pull request.

[codecov[bot]]

Codecov Report

Merging #36 (f147283) into master (876de6b) will increase coverage by 0.00%. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #36   +/-   ##
=======================================
  Coverage   95.40%   95.41%           
=======================================
  Files           5        5           
  Lines        1612     1591   -21     
=======================================
- Hits         1538     1518   -20     
+ Misses         74       73    -1     

Impacted Files	Coverage Δ
src/model.jl	96.24% <0.00%> (+0.03%)	:arrow_up:

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