[dovecot/pigeonhole] 5b9333: Update NEWS file for v0.5.4 release.

[GitHub]

  Branch: refs/heads/master-0.5
  Home:   https://github.com/dovecot/pigeonhole
  Commit: 5b93331c4d64d89cc26bfd81b32af0e7160c208f
      https://github.com/dovecot/pigeonhole/commit/5b93331c4d64d89cc26bfd81b32af0e7160c208f
  Author: Stephan Bosch <stephan.bosch at dovecot.fi>
  Date:   2018-11-23 (Fri, 23 Nov 2018)

  Changed paths:
    M NEWS

  Log Message:
  -----------
  Update NEWS file for v0.5.4 release.



      **NOTE:** This service has been marked for deprecation: https://developer.github.com/changes/2018-04-25-github-services-deprecation/

      Functionality will be removed from GitHub.com on January 31st, 2019.