fix(isByteLength): default min to 0 in the legacy positional signature

[greymoth-jp]

isByteLength accepts two signatures: the object form isByteLength(str, { min, max }) and the legacy positional form isByteLength(str, min, max).

The object branch defaults min to 0 (options.min || 0), but the legacy branch used min = arguments[1] with no default. When min is omitted there, it stays undefined, so the final len >= min check becomes len >= NaN and always returns false.

The README documents the default as { min: 0, max: undefined }, and the sibling isLength already uses arguments[1] || 0 in the same legacy branch, so this only affected isByteLength.

Before:

• isByteLength('abc') returned false
• isByteLength('abc', undefined, 3) returned false

After, both return true, matching isByteLength('abc', { max: 3 }) which was already correct.

Added a case to the existing deprecated-api test block, mirroring the { max: 3 } object test that was already there.

Checklist

• PR contains only changes related; no stray files, etc.
• README updated (where applicable)
• Tests written (where applicable)
• References provided in PR (where applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (a38f15b) to head (a074b32).

Additional details and impacted files

@@            Coverage Diff            @@
##            master     #2791   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files          114       114           
  Lines         2587      2587           
  Branches       656       657    +1     
=========================================
  Hits          2587      2587           

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