Rewrite with pure functional Either<Error, Result> pattern

[andrenarchy]

Fixes #22.

[codecov]

Codecov Report

Merging #29 (8d7acbd) into main (f0127ae) will increase coverage by 6.94%.
The diff coverage is 98.24%.

@@            Coverage Diff             @@
##             main      #29      +/-   ##
==========================================
+ Coverage   90.11%   97.05%   +6.94%     
==========================================
  Files          14       15       +1     
  Lines         172      204      +32     
  Branches       48       47       -1     
==========================================
+ Hits          155      198      +43     
+ Misses          6        2       -4     
+ Partials       11        4       -7     

Impacted Files	Coverage Δ
src/array.ts	83.33% <90.00%> (+23.33%)	⬆️
src/object.ts	95.34% <97.22%> (+8.86%)	⬆️
src/boolean.ts	100.00% <100.00%> (ø)
src/date.ts	100.00% <100.00%> (ø)
src/enumerate.ts	100.00% <100.00%> (ø)
src/errors.ts	100.00% <100.00%> (ø)
src/index.ts	100.00% <100.00%> (ø)
src/number.ts	100.00% <100.00%> (ø)
src/parse-boolean.ts	100.00% <100.00%> (+11.11%)	⬆️
src/parse-date.ts	100.00% <100.00%> (+10.00%)	⬆️
... and 6 more

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