fix: add npm auto publish for master version changes

.circleci/config.yml

@@ -51,9 +51,38 @@ jobs:
 
       - run: npm test
 
+  publish_to_npm:
+    docker:
+      - image: circleci/node:10
+
+    working_directory: ~/repo
+
+    steps:
+      - checkout
+
+      # Download and cache dependencies
+      - restore_cache:
+          keys:
+          - v1-dependencies-{{ checksum "package.json" }}
+          # fallback to using the latest cache if no exact match is found
+          - v1-dependencies-
+
+      - run: mv npmrc-env .npmrc
+
+      - run:
+          name: Publish to NPM (only if a new version has been tagged)
+          command: if [ "$(npm show codiusd version)" != "$(npm ls --depth=-1 2>/dev/null | head -1 | cut -f 1 -d " " | cut -f 2 -d @)" ] ; then npm publish ; fi
+
 workflows:
   version: 2
   build:
     jobs:
       - build_node_v10
       - build_node_v8
+      - publish_to_npm:
+          requires:
+            - build_node_v10
+          filters:
+            branches:
+              only:
+                - master

npmrc-env

@@ -0,0 +1 @@
+//registry.npmjs.org/:_authToken=${NPM_TOKEN}