Added yarn

.babelrc

 {
-  "presets": ["es2015", "stage-0"]
+  "presets": ["es2015"]
 }

.gitlab-ci.yml

@@ -7,14 +7,14 @@ cache:
 compile:
   stage: test
   script:
-    - npm i
-    - npm run webpack
+    - yarn install
+    - yarn run webpack
 test:
   stage: test
   script:
-    - npm i
-    - npm test
+    - yarn install
+    - yarn test
 pages:
   stage: deploy

package.json

@@ -8,10 +8,7 @@
     "webpack-run": "webpack --watch",
     "webpack": "webpack"
   },
-  "repository": {
-    "type": "git",
-    "url": "git+ssh://git@gitlab.com/gl-frontend/notebooklab.git"
-  },
+  "repository": "git+ssh://git@gitlab.com/gl-frontend/notebooklab.git",
   "author": "",
   "license": "MIT",
   "bugs": {