I've updated the git repository for codemirror-js (last updated
2015-07) from 5.4 to 5.19. I maintain jupyter-notebook which depends
upon this package.
This isn't the most recent version (5.30 was released in the last few
days, 5.19 is from late 2016), but versions from 5.20 onwards build
using rollup+plugins which I think isn't fully packaged yet, so this at
least brings the package a bit more up-to-date.
This addresses #801119