English tokenizer should expand contractions, e.g. they're to they are (instead of they and re)

[niftylettuce]

e.g. https://github.com/anton-bot/expand-contractions

[titanism]

Note that we're in the process of rewriting expand-contractions into an independent package called @spamscanner/expand-contractions which has all vulnerabilities fixed and also a modern updated of contractions (see anton-bot/expand-contractions#1).

[titanism]

Ref: stdlib-js/stdlib#496