Add gitlab ci

second try

.gitlab-ci.yml

@@ -80,6 +80,7 @@ build-gcc7:
 build-macos:
   stage: build
   tags: [macos]
+  needs: []
   before_script:
     - brew update
     - brew bundle --file=./.ci/macos/Brewfile
@@ -105,6 +106,7 @@ linting:
   stage: build
   image: alpine:latest
   tags: [docker]
+  needs: []
   before_script:
     - apk update && apk add clang make git
   script: