[vala] Created tag 0.52.6

[Rico Tzschichholz <ricotz src gnome org>]

The signed tag '0.52.6' was created.

Tagger: Rico Tzschichholz <ricotz ubuntu com>
Date: 1633340779 +0200

    0.52.6

Changes since the last tag '0.52.5':

Gustav Hartvigsson (1):
      valadoc: Correctly format background of inline @link's

Princeton Ferro (1):
      codegen: Fix property access inside opaque compact class

Rico Tzschichholz (17):
      glib-2.0: Current constants in GLib.Math are part of glib.h
      tests: Extend "field access" tests to increase coverage
      glib-2.0: Add RefString since 2.58
      gio-2.0: Unhide a few usable symbols which are marked not introspectable
      vala: Warn about unsupported cast to void and drop it
      vala: Don't restrict element type of GLib.Array
      codegen: Add type declaration for implicit temporary local variable
      vala: Multi-dimensional params-array not allowed
      build: At least valac 0.16.1 is required
      docs: Bump vala version references in README.md
      docs: Add myself to AUTHORS
      vala: Accept NullType as generic type argument
      tests: Add "integer/float literal" tests to increase coverage
      gio-2.0: Backport fixes from 0.54.2
      gtk4: Backport fixes from 0.54.2
      vala: Set source references of created DataType instances in OCE
      Release 0.52.6