Log Message:
vala: update to 0.38.7.

Vala 0.38.7
===========
 * Regression fix:
  - codegen: Don't try to infer error argument on async begin methods [#793158]
    This was a regression introduced by [#614294]

Vala 0.38.6
===========
 * Various bug fixes:
  - girparser:
    + Set NoAccessorMethod for non-readable and construct-only properties
    + Ignore conflicting closure/destroy indexes
    + Don't accept methods as property-accessor which throw errors [#792998]
  - codegen:
    + Infer error parameter from abstract/virtual base methods [#614294]
    + Fix return-type for cancelled async creation methods of classes [#792942]
  - vala: Variadic constructors without a real first parameter are not allowed
  - libvaladoc: Keep bootstrap-support with valac >= 0.16.1

 * Bindings:
  - gstreamer-1.0: Update from 1.13+ git master
  - gtk+-4.0: Only override type of "event" parameters

Vala 0.38.5
===========
 * Various improvements and bug fixes:
  - codegen
    + Only add property-enum and GParamSpec-array for GObject classes
    + Add destroy param when invoking delegate returned by delegate [#792077]
  - vala: Add pkgdatadir and pkglibdir to pkg-config file
  - gidlparser: Update type qualifiers
  - libvaladoc: Allow @link tags to be split over multiple lines [#646982]
  - libvaladoc: Add support for single line documentation comments [#736483]
  - vala: Fix parameter type inference of overridden async methods [#792660]
  - codewriter: Don't use string.replace() to apply header_to_override [#731322]

 * Bindings:
  - glib-2.0: Add GLib.OPTION_REMAINING and GLib.OptionFlags.NONE
  - gstreamer-1.0: Update from 1.13+ git master
  - gtk+-2.0: Mark MessageDialog constructor parameter, message_format, as
    nullable [#791570]
  - gtk+-2.0/3.0: Don't hide user_data in Clipboard.set_with_data() [#792237]
  - gtk+-3.0: Update to 3.22.26+6f26d0dc
  - gtk+-4.0: Update to 3.93.0 and split Gsk.RenderNode into several classes
  - libwnck-3.0: Update to 3.24.1
  - posix: Add ctime(3) and fix binding of struct hostent and gethostbyname(3)
  - webkit2gtk-4.0: Update to 2.19.5
  - webkit2gtk-web-extension-4.0: Fix DOM.EventTarget interface