WIP 🐛 use map instead of filter to return a promise

[DonJayamanne]

Fix bug introduced in #831
Selection of interpreters throws error. Not creating an issue for this, just tying it to the original issue that #831 resolved.
Using map to ensure a promise is returned.

[DonJayamanne]

Will add a test to test this.

[codecov]

Codecov Report

Merging #842 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #842      +/-   ##
==========================================
- Coverage   63.46%   63.45%   -0.01%     
==========================================
  Files         258      258              
  Lines       11845    11843       -2     
  Branches     2104     2104              
==========================================
- Hits         7517     7515       -2     
  Misses       4320     4320              
  Partials        8        8

Impacted Files	Coverage Δ
...t/interpreter/configuration/interpreterSelector.ts	46.51% <100%> (-1.22%)	⬇️

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