[dovecot/pigeonhole] 190fe3: Add v0.5.2 to NEWS.

[GitHub]

  Branch: refs/heads/master-0.5
  Home:   https://github.com/dovecot/pigeonhole
  Commit: 190fe3967d54205a7f6d15e6deb5652387926695
      https://github.com/dovecot/pigeonhole/commit/190fe3967d54205a7f6d15e6deb5652387926695
  Author: Stephan Bosch <stephan.bosch at dovecot.fi>
  Date:   2018-08-08 (Wed, 08 Aug 2018)

  Changed paths:
    M NEWS

  Log Message:
  -----------
  Add v0.5.2 to NEWS.



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