Merge branch 'ci' into 'master'

CI: added debian, macos, win32 and win64 build jobs.

See merge request !1
4 jobs for master in 5 minutes and 2 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #240998
debian amd64
build-debian

00:00:50

passed #240999
macos
build-macos

00:01:38

passed #241001
debian amd64 win32
build-win32

00:02:01

passed #241000
debian amd64 win64
build-win64

00:02:09