[vala] (17 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:

  0221ed2... build: Add --enable-test-asan configure option
  767b5c4... coverage: Build gidl-bindings
  848cd88... ci: Add .gitlab-ci.yml
  7396bea... ci: Add ubuntu:16.04 run with gcc
  d897555... ci: Add ubuntu:devel run with clang and address-sanitizer
  88531d1... ci: Add archlinux:latest run with gcc
  e7d0b22... ci: Pin archlinux before glibc bump
  7601de6... ci: Add alpine:edge run with gcc
  db0d123... ci: Always deploy

Commits added to the branch:

  99ba32d... Release 0.51.90 (*)
  e4991e3... vala: Add missing null-check in DataType.get_type_signature (*)
  fc066f1... glib-2.0: Add some missing type-arguments (*)
  0c87614... gio-2.0: Add some missing type-arguments (*)
  865bafb... vala: Move type-argument/-parameter count check to DataType (*)
  07c1f09... vala: Check array type of declarations for errornous type-a (*)
  67c42f7... vala: Check (optional) type-arguments of array creation exp (*)
  208a41f... codegen: Report error for missing type-arguments of HashTab (*)
  0a757d7... build: Add --enable-test-asan configure option
  108844e... coverage: Build gidl-bindings
  8e84068... ci: Add .gitlab-ci.yml
  7757575... ci: Add ubuntu:16.04 run with gcc
  7a68f03... ci: Add ubuntu:devel run with clang and address-sanitizer
  11f91d2... ci: Add archlinux:latest run with gcc
  0b92c70... ci: Pin archlinux before glibc bump
  9fde262... ci: Add alpine:edge run with gcc
  de1b6f2... ci: Always deploy

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