fix broken circle config

Author: manwaring

.circleci/config.yml

@@ -11,6 +11,9 @@ jobs:
     steps:
       - checkout
       - node/install-packages
+      - run:
+          name: Set npm credentials for publishing
+          command: echo "//registry.npmjs.org/:_authToken=$NPM_PUBLISH_TOKEN" >> ~/.npmrc
       - run:
           name: Publish on npm
           command: npm run publish-please