Add option to dekonize peptide into AA list

[melihyilmaz]

Added option for detokenize to return peptide sequence as a list of amino acids rather than only in the string format. This was needed in the context of Casanovo for cases where multiple N-terminal modifications are predicted back to back (e.g. -17.027+42.011) and the downstream regex logic fails to differentiate these PTMs. Refer to below discussion for more details:
Noble-Lab/casanovo#87 (comment)

[melihyilmaz]

@wfondrie Should I add a unit test for detokenize or is failure due to something else?

[wfondrie]

The above previous errors were due to a failure to upload test coverage to CodeCov, which hopefully I've fixed now 🤞

Should I add a unit test for ...

The answer to this question is always yes 😉

[codecov-commenter]

Codecov Report

Merging #22 (16b9098) into main (23683c0) will not change coverage.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main      #22   +/-   ##
=======================================
  Coverage   87.00%   87.00%           
=======================================
  Files          19       19           
  Lines         854      854           
=======================================
  Hits          743      743           
  Misses        111      111           

Impacted Files	Coverage Δ
depthcharge/components/transformers.py	98.16% <100.00%> (ø)

📣 We’re building smart automated test selection to slash your CI/CD build times. Learn more

[wfondrie]

Is there a good reason to every return a string? It seems like we should just make it always return a list. It seems easy enough for the user to join the string if they desire. 🤔

I'd ok with the breaking change for now, since I think Casanovo is currently the only dependent. What do you think @melihyilmaz and @bittremieux?

[bittremieux]

I concur.

[melihyilmaz]

Makes sense we can only return a list, I added it as an option earlier to avoid breaking things down.