Merge branch 'ci' into 'master'

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

See merge request !2
4 jobs for master in 2 minutes and 16 seconds (queued for 18 seconds)
latest
Status Job ID Name Coverage
  Build
passed #240696
amd64 debian
build-debian

00:00:44

passed #240697
macos
build-macos

00:00:23

passed #240699
win32 amd64 debian
build-win32

00:00:45

passed #240698
win64 amd64 debian
build-win64

00:00:46