[vala] (4 commits) Non-fast-forward update to branch wip/generics

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/generics' was changed in a way that was not a fast-forward update.
NOTE: This may cause problems for people pulling from the branch. For more information,
please see:

 https://wiki.gnome.org/Git/Help/NonFastForward

Commits removed from the branch:

  018b852... vala: Check delegate type parameter parity
  50b11c2... vapi: Add missing type parameters for delegates
  f47a4a1... Add missing generic-type arguments

Commits added to the branch:

  3ddd120... tests: Don't rely on external delegate defintions (*)
  48ca4e0... Add missing generic-type arguments of delegates (*)
  3d578aa... vala: Check delegate type parameter parity
  693423b... vapi: Add missing type parameters for delegates

(*) This commit already existed in another branch; no separate mail sent