[amtk] Created tag 5.3.1

[Sébastien Wilmet <swilmet src gnome org>]

The unsigned tag '5.3.1' was created.

Tagger: Sébastien Wilmet <sw swilmet be>
Date: 1610357942 +0100

    Release 5.3.1

Changes since the last tag '5.2.0':

Efstathios Iosifidis (1):
      Add Greek translation

Goran Vidović (2):
      Add Croatian translation
      Update Croatian translation

Sébastien Wilmet (12):
      meson: start to port the build system to Meson
      autotools: remove gtk-doc
      meson: gtk-doc
      docs: fix warning
      meson: fix version number
      autotools: remove all the Autotools build system
      build: use localedir directly
      Remove AUTHORS file
      readme: Markdown format, plus small update
      Bump version, and start to write NEWS for next release
      build: add gobject_introspection option
      Release 5.3.1