Vala 0.54.0
===========
 * Various improvements and bug fixes:
  - vala: Warn about unsupported cast to void and drop it [#1070]
  - vala: Don't restrict element type of GLib.Array [#1227]
  - valadoc: Correctly format background of inline @link's [#1226]

 * Bindings:
  - gio-2.0: Unhide a few usable symbols which are marked not introspectable [#1222]