Fix: skip whitespace in empty array brackets

[nathan-duddles]

What issue does this pull request resolve?
Fixes issue #2595

What changes did you make?
Skip whitespace before parsing items within array, because the function that parses array, parseItems, assumes that if there is whitespace then there exists items to parse.

Is there anything that requires more attention while reviewing?
This fix might also be accomplished by adding the skip whitespaces call to tryParseItems, but tryParseItems is also used by parseValues function in the same file, and it is not clear if parseValues would require the same change (while testing parsing an empty { } containing white space, the parseJson was used instead of parseValues, so I am not sure if this same bug appears in that path... I don't understand where parseValues is actually used).