…remove extraneous comments

The arrayLimit option is documented as limiting the 'maximum index'
    in an array, but was incorrectly being applied to the array length.
    This caused inconsistent behavior between indexed (param[0]=val) and
    non-indexed (param[]=val) array parameters.

With arrayLimit: 3:
 - BEFORE: 4 elements (indices 0-3) would convert to object since
      length 4 > limit 3
 - AFTER: 4 elements (indices 0-3) stays as array since max index
      3 <= limit 3

Changes:
 - utils.js combine(): Check 'length - 1 > limit' instead of 'length > limit'
 - utils.js merge(): Apply arrayLimit when appending to arrays
 - parse.js parseArrayValue(): Use '>' instead of '>=' for throwOnLimitExceeded check

Tests updated to reflect correct behavior per documentation.

Fixes #540.

Co-authored-by: Jordan Harband <ljharb@gmail.com>
Co-authored-by: Kai Gritun <kai@kaigritun.com>

…hen `throwOnLimitExceeded` is true

Fixes #529

…e`/`parseArrayValue`

…arrayLimit`

Fixes #546

Fixes #543

Fixes #418