Revert "[iso-core] Upgrade nodemailer"
Revert "[iso-core] Upgrade nodemailer"

This reverts commit e3e3cd20e54ec351442862a0d6af2a01467251a7.

Reason for revert: breaks Send Later. Needs more testing.

nylas-mail-lives/nylas-mail,nylas/nylas-mail,simonft/nylas-mail,nirmit/nylas-mail,nylas/nylas-mail,simonft/nylas-mail,simonft/nylas-mail,simonft/nylas-mail,nylas-mail-lives/nylas-mail,nirmit/nylas-mail,nylas-mail-lives/nylas-mail,nylas/nylas-mail,nirmit/nylas-mail,nylas/nylas-mail,nylas-mail-lives/nylas-mail,nylas/nylas-mail,nylas-mail-lives/nylas-mail,simonft/nylas-mail,nirmit/nylas-mail,nirmit/nylas-mail