Merge branch 'winh-check-yarn-version' into 'master'

Check that yarn version is at least 1.10.0

See merge request gitlab-org/gitlab-ce!23612

.gitlab-ci.yml

@@ -637,7 +637,7 @@ gitlab:setup-mysql:
 # Frontend-related jobs
 gitlab:assets:compile:
   <<: *dedicated-no-docs-and-no-qa-pull-cache-job
-  image: dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.5.3-git-2.18-chrome-69.0-node-8.x-yarn-1.2-graphicsmagick-1.3.29-docker-18.06.1
+  image: dev.gitlab.org:5005/gitlab/gitlab-build-images:ruby-2.5.3-git-2.18-chrome-69.0-node-8.x-yarn-1.12-graphicsmagick-1.3.29-docker-18.06.1
   dependencies: []
   services:
     - docker:stable-dind

package.json

@@ -159,5 +159,8 @@
     "prettier": "1.15.2",
     "vue-jest": "^3.0.1",
     "webpack-dev-server": "^3.1.10"
+  },
+  "engines": {
+    "yarn": "^1.10.0"
   }
 }