Fix negative lookbehind matches on javascript (#109)
Fix negative lookbehind matches on javascript (#109)

* (wip) fix negative lookbehind false positive match

* improve the performance of negative lookbehind matches

matthewshim-ms/Recognizers-Text,matthewshim-ms/Recognizers-Text,rubio41/Recognizers-Text,rubio41/Recognizers-Text,rubio41/Recognizers-Text,matthewshim-ms/Recognizers-Text,matthewshim-ms/Recognizers-Text,rubio41/Recognizers-Text,matthewshim-ms/Recognizers-Text,matthewshim-ms/Recognizers-Text,rubio41/Recognizers-Text,matthewshim-ms/Recognizers-Text