Merge remote-tracking branch 'Knights/rebase' into namespace

change namespace to knights-analytics

attempt to downgrade go to v1.20

ref: knights-analytics/hugot#22

upgrade to tokenizers 0.19.1

fix EncodeOptions -> encodeOpts

Upgrade language versions

Upgrade to tokenizers v0.15.2

upgrade to tokenizer 0.15.1

Prepare 0.8.0 release