chore: status-back from circleci

.circleci/config.yml

@@ -21,6 +21,7 @@ jobs:
       - store_artifacts:
           path: htdocs
           destination: htdocs
+      - run: npx status-back -s -c circleci/preview -r c3js/c3 "preview build succes!" "https://${CIRCLE_BUILD_NUM}-11496279-gh.circle-artifacts.com/0/preview/index.html"
   publish-docs:
     docker:
       - image: circleci/ruby:2.4-node

package.json

@@ -71,6 +71,7 @@
     "nodemon": "^1.11.0",
     "rollup": "^0.63.0",
     "rollup-plugin-babel": "^3.0.3",
+    "status-back": "^1.1.0",
     "uglify-js": "^3.3.17",
     "watchify": "^3.11.0"
   },