[vala] (14 commits) Non-fast-forward update to branch wip/ci

[Rico Tzschichholz <ricotz src gnome org>]

The branch 'wip/ci' 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:

  1622982... coverage: Build gidl-bindings
  cae78c5... ci: Add .gitlab-ci.yml
  7971ddb... ci: Add ubuntu:16.04 run with gcc
  93cba91... ci: Add ubuntu:18.04 run with gcc
  261312c... ci: Add fedora:rawhide run with clang
  15cc4ad... ci: Add archlinux/base:latest run with gcc
  792d9b8... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  b3a4843... ci: Add alpine:edge run with gcc
  f3d62ca... ci: Always deploy

Commits added to the branch:

  105f1c3... codegen: Don't leak array memory after it was implicitly co (*)
  619b96f... codegen: Use g_boxed_free in free-wrapper for heap-allocate (*)
  7fbbbb9... vala: GLib.Value unboxing returns unowned value (*)
  4d02354... vala: Don't allow GLib.Value casting to nullable struct/sim (*)
  5328619... codegen: Don't leak GLib.Value when implicitly unboxing it (*)
  23a6f18... coverage: Build gidl-bindings
  ffc8a42... ci: Add .gitlab-ci.yml
  cce748b... ci: Add ubuntu:16.04 run with gcc
  c455b1f... ci: Add ubuntu:18.04 run with gcc
  d63a887... ci: Add fedora:rawhide run with clang
  8958784... ci: Add archlinux/base:latest run with gcc
  5989c42... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  3ea2222... ci: Add alpine:edge run with gcc
  0508995... ci: Always deploy

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