Add NPM publish step

.circleci/config.yml

@@ -2,7 +2,7 @@
 #
 # Check https://circleci.com/docs/2.0/language-javascript/ for more details
 #
-version: 2
+version: 2.1
 jobs:
   build:
     docker:
@@ -49,6 +49,17 @@ jobs:
           command: npm run build
       - store_artifacts:
           path: build
+      - store_artifacts:
+          path: dist
+      - save_cache:
+          paths:
+            - build
+          key: v1-build-{{ .BuildNum }}
+      - save_cache:
+          paths:
+            - dist
+          key: v1-dist-{{ .BuildNum }}
+      
       
       - run:
           name: Integration
@@ -59,3 +70,29 @@ jobs:
           path: test-results
 
       - run: greenkeeper-lockfile-upload
+  deploy-npm:
+    docker:
+      - image: circleci/node:8.16-browsers
+    working_directory: ~/repo  
+    steps:
+      - checkout
+      - restore_cache:
+          keys:
+            - v1-dist-{{ .BuildNum }}
+      - run: npm publish --dry-run
+workflows:
+  version: 2
+  build_and_deploy:
+    jobs:
+      - build
+      - deploy-npm:
+          requires:
+            - build
+          filters:
+            branches:
+              only:
+                - master
+                - develop
+                - smoke
+                - circle
+                - /^hotfix\/.*/