fix: cover isOptional case with return null

[borracciaBlu]

No description provided.

[codecov]

Codecov Report

Merging #7 (9761b47) into main (50c31ad) will not change coverage.
The diff coverage is n/a.

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@@           Coverage Diff           @@
##             main       #7   +/-   ##
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  Coverage   95.02%   95.02%           
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  Files          58       58           
  Lines         603      603           
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  Hits          573      573           
  Misses         30       30           

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[borracciaBlu]

Hi @medikoo ,

I've just realised that the types were not covering the isOptional case...

isOptional - Makes null or undefined accepted as valid value. In such case instead of TypeError being thrown, null is returned.
default - A value to be returned if null or undefined is passed as an input value.

I've assumed that default will be forced of the same type of the ensure function.
Let me know.

[medikoo]

Thank you @borracciaBlu, looks great 👍