[vala] (15 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:

  d3feb13... coverage: Build gidl-bindings
  44da68e... ci: Add .gitlab-ci.yml
  e1677b5... ci: Add ubuntu:16.04 run with gcc
  bbb3c70... ci: Add archlinux:latest run with gcc
  7fea8db... ci: Add alpine:edge run with gcc
  6ea75f6... ci: Add fedora:rawhide run with clang
  0fac5c6... Fedora rawhide is broken
  fff408d... Ubuntu devel is broken
  aa32245... Alpine edge is broken
  ae7c3d5... ci: Build manual as pdf and html
  c89eb97... ci: Always deploy
  6938ab0... ci: Pin archlinux before glibc bump
  a6d005d... ci: Add ubuntu:devel run with clang and address-sanitizer
  a8fccd1... ci: Add ubuntu:18.04 run with gcc
  46b8615... coverage: Use 'make check' to run all tests

Commits added to the branch:

  192c6df... build: At least valac 0.16.1 is required (*)
  ecdb9b8... docs: Bump vala version references in README.md (*)
  aeb38b2... docs: Add myself to AUTHORS (*)
  fe3625d... vala: Accept NullType as generic type argument (*)
  7c179d5... coverage: Build gidl-bindings
  d695530... ci: Add .gitlab-ci.yml
  bd1f698... ci: Add ubuntu:16.04 run with gcc
  af437f4... ci: Add archlinux:latest run with gcc
  95af199... ci: Add alpine:edge run with gcc
  82dcf54... ci: Add fedora:rawhide run with clang
  41a682e... Fedora rawhide is broken
  f647e33... Ubuntu devel is broken
  8370b76... Alpine edge is broken
  2ea4053... ci: Build manual as pdf and html
  d05a115... ci: Always deploy

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