[iagno] Created tag 3.31.90

[Arnaud B. <arnaudb src gnome org>]

The unsigned tag '3.31.90' was created.

Tagger: Arnaud Bonatti <arnaud bonatti gmail com>
Date: 1549353552 +0100

    Release 3.31.90.

Changes since the last tag '3.31.4':

Arnaud B (1):
      Merge branch 'gitlab-ci' into 'master'

Arnaud Bonatti (6):
      Make post-install work if datadir set.
      Use org.gnome.Reversi app-id.
      Add translators comments.
      Add a valign=center.
      Bump Gtk+ required version to 3.20.
      Prepare 3.31.90.

Balázs Úr (1):
      Update Hungarian translation

Bilal Elmoussaoui (4):
      ditch autotools and migrate to meson
      Gitlab CI: set up Flatpak nightlies
      Meson: fix post install
      Meson: validate appdata file without network access

Daniel Șerbănescu (1):
      Update Romanian translation

Fran Dieguez (1):
      Update Galician translation

Kukuh Syafaat (1):
      Update Indonesian translation

Matej Urbančič (1):
      Added Slovenian translation

Piotr Drąg (1):
      Update Polish translation