v1.4.0

There has been significant internal refactoring since the last release which
might have introduced some new bugs. Be sure to report anything you find.
However, as usual, there has been a lot of bug-fixing and a lot of new features
have been added as well. Look at the full changelog for a breakdown.
Some important points to note:

For users:

• Behavioural changes

  In the previous release we introduced support for clients to mark
  notifications as 'transient'. Transient notifications used to 1) bypass
  idle_threshold and 2) not be saved in history.
  The latter behaviour has been disabled by default and can be re-created using
  rules if necessary. Transient notifications will now only bypass
  idle_threshold.

  Additionally, to be compliant with the notification spec, the notification
  summary no longer accepts markup.

For maintainers:

• Dependency on libxdg-basedir has been removed