Update package.json
Update package.json

Delete plugins and update some:

Deleted:
 - ep_headings
 - ep_markdownify
Updated:
 - ep_scrollto
 - ep_tables2
cloudfoundry-community/etherpad-lite-cf,cloudfoundry-community/etherpad-lite-cf,cloudfoundry-community/etherpad-lite-cf,cloudfoundry-community/etherpad-lite-cf