Add token_similarity_sort_ratio and sortBySimilarity

Add token_similarity_sort_ratio functions and sortBySimilarity support to token_set_ratio.

1.3.1

Add in some brackets to work around an issue with the Rollup bundler.

1.3.0

Add asyncOffset option, minor README touch-ups.

1.2.2

Update regex to Unicode 12.1.

1.2.0

Add cancellation and async optimizations.

1.1.2

Small optimization in token set, extractAsPromised added.

1.0.2

Fix full_process definition in .d.ts

1.0.1

Bump to 1.0 + .1 fix for react native

js-levenshtein

use js-levenshtein for distance when no scoring options set

add whitespace collapsing

add whitespace collapsing