fix: let make-dir use its own types

[JustinBeckwith]

No description provided.

[codecov-io]

Codecov Report

Merging #72 into master will decrease coverage by 1.73%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master      #72      +/-   ##
==========================================
- Coverage    80.3%   78.57%   -1.74%     
==========================================
  Files           4        4              
  Lines         330      266      -64     
  Branches       73       41      -32     
==========================================
- Hits          265      209      -56     
+ Misses         65       57       -8

Impacted Files	Coverage Δ
ts/src/package-json-file.ts	65.21% <0%> (-2.79%)	⬇️
ts/src/checker.ts	73.07% <0%> (-2.19%)	⬇️
ts/src/config.ts	100% <0%> (ø)	⬆️
ts/src/github.ts	87.93% <0%> (+0.43%)	⬆️

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