[DEPENDENCIES] Switch to our fork of html2text.
[DEPENDENCIES] Switch to our fork of html2text.

PR submitted upstream, but don't want to just sit around and wait for the next
release.

Fixes T265.

wakermahmud/sync-engine,ErinCall/sync-engine,gale320/sync-engine,ErinCall/sync-engine,EthanBlackburn/sync-engine,ErinCall/sync-engine,ErinCall/sync-engine,ErinCall/sync-engine,PriviPK/privipk-sync-engine,nylas/sync-engine,PriviPK/privipk-sync-engine,jobscore/sync-engine,EthanBlackburn/sync-engine,PriviPK/privipk-sync-engine,closeio/nylas,wakermahmud/sync-engine,EthanBlackburn/sync-engine,closeio/nylas,nylas/sync-engine,gale320/sync-engine,Eagles2F/sync-engine,Eagles2F/sync-engine,wakermahmud/sync-engine,wakermahmud/sync-engine,wakermahmud/sync-engine,EthanBlackburn/sync-engine,gale320/sync-engine,Eagles2F/sync-engine,jobscore/sync-engine,EthanBlackburn/sync-engine,Eagles2F/sync-engine,nylas/sync-engine,jobscore/sync-engine,closeio/nylas,PriviPK/privipk-sync-engine,jobscore/sync-engine,Eagles2F/sync-engine,nylas/sync-engine,PriviPK/privipk-sync-engine,closeio/nylas,gale320/sync-engine,gale320/sync-engine