* upstream/master: (47 commits)
  Update CHANGELOG.md for 9.4.5
  Update charlock_holmes
  add a changelog entry
  switch to multi-line before block
  restructure the #new_key notification spec
  don't send devise notifications to the ghost user
  reset_delivered_emails before testing #new_key
  skip the :read_project check for new_project_member
  move the member spec to be with the other ones
  add a spec for new_group_member
  add a spec for never emailing the ghost user
  rubocop fix
  a membership with no user is always notifiable
  check notifiability for more emails
  add Member#notifiable?(type, opts)
  make NotificationRecipient a little more customizable
  Add notes about database performance for MySQL
  fix confidential border issue as well as confidential styles leaking on new MR
  Migrate force push check to Gitaly
  Add option to disable project export on instance
  ...