[vala] (2 commits) Non-fast-forward update to branch wip/issue/1342

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/issue/1342' 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:

  0cfe9e2... vala: Enforce required type-arguments on parameter/return t

Commits added to the branch:

  e74724d... Bump version suffix to 0.58 (*)
  661f08e... vala: Enforce required type-arguments on parameter/return t (*)

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