Support stdout

[drwpow]

Fixes #279. Now makes the -o flag optional if you’d like to instead output with stdout.

If you choose to do so, the normal console.logs are hidden.

[codecov]

Codecov Report

Merging #387 (9a9d2e7) into main (e73e0d3) will increase coverage by 0.52%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##             main     #387      +/-   ##
==========================================
+ Coverage   92.91%   93.43%   +0.52%     
==========================================
  Files           5        5              
  Lines         268      259       -9     
  Branches       90       84       -6     
==========================================
- Hits          249      242       -7     
  Misses         13       13              
+ Partials        6        4       -2     

Impacted Files	Coverage Δ
src/index.ts	81.81% <50.00%> (ø)
src/property-mapper.ts	84.21% <50.00%> (ø)
src/v2.ts	84.61% <87.50%> (+0.89%)	⬆️
src/v3.ts	96.89% <93.54%> (+0.63%)	⬆️
src/utils.ts	100.00% <100.00%> (ø)

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