Added match index location for array key[tris]

[Hypnosphi]

Same PR as #167 with some improvements:

• index was renamed to arrayIndex to highlight difference with indices
• arrayIndex is passed even if array has length 1, for consistency
• matches items now have value field with original text value which makes dead simple to check if the match corresponds to particular field
• minMatchCharLength doesn't work properly #164 fix respects the docs and excludes only matches, not results
• tests added

[igor-dv]

@krisk , will this PR be marged soon ?

[krisk]

Could you address the failure? Thanks!

[Hypnosphi]

Looks like I just had to run build before commiting. Maybe it's worth to run it before tests on CI

[krisk]

Great 👍I’ll publish a new version with these (and other) changes.