[vala] (20 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:

  55e1ee6... coverage: Build gidl-bindings
  0656c31... ci: Add .gitlab-ci.yml
  f3ef8bb... ci: Add ubuntu:16.04 run with gcc
  29d9efe... ci: Add ubuntu:18.04 run with gcc
  0c70014... ci: Add fedora:latest run with clang
  de9117a... ci: Add archlinux/base:latest run with gcc
  99d69ea... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  1f4af41... ci: Always deploy

Commits added to the branch:

  ea07220... parser: Extend source_reference of parenthesized expr to co (*)
  8dd348c... codegen: Use result value of assignment rather than its com (*)
  8021ad3... glib-2.0: Let (u)int.try_parse() return false if there is a (*)
  98ab3da... Add further support for params arrays (*)
  217c84b... vala: Always bail if there are semantic errors (*)
  69ea76f... girparser: Improve source_reference of parameters (*)
  6feaa3b... girparser: Apply explicitly given ctype metadata attributes (*)
  37e488d... Regenerate for GIR-based bindings to apply explicit ctype a (*)
  f54ea2f... webkit2gtk-4.0: Update to 2.27.4 (*)
  17f5a28... gtk4: Update to 3.96.0+7e2e92a8 (*)
  b942a94... gstreamer: Update from 1.17.0+ git master (*)
  98d3f54... vapi: Update GIR-based bindings (*)
  ff8cfad... coverage: Build gidl-bindings
  36a2ce0... ci: Add .gitlab-ci.yml
  af190a3... ci: Add ubuntu:16.04 run with gcc
  f7a223c... ci: Add ubuntu:18.04 run with gcc
  b2b6ab9... ci: Add fedora:latest run with clang
  1d185c3... ci: Add archlinux/base:latest run with gcc
  fac1e6b... ci: archlinux/bison - https://bugs.archlinux.org/task/64165
  5b8322c... ci: Always deploy

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