Deploy using travis

.travis.yml

@@ -8,12 +8,12 @@ node_js:
 script:
 - npm run ci
 
-# deploy:
-#   provider: npm
-#   skip_cleanup: true
-#   email: [email protected]
-#   api_key:
-#     secure: 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
-#   on:
-#     tags: true
-#     branch: master
+deploy:
+  provider: npm
+  skip_cleanup: true
+  email: [email protected]
+  api_key:
+    secure: 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
+  on:
+    tags: true
+    branch: master

CONTRIBUTING.md

@@ -0,0 +1,18 @@
+## Release on NPM
+
+_Only core contributors may release to NPM._
+
+To release a new version on NPM, first ensure all tests pass with `npm test`,
+then use `npm version patch|minor|major` in order to increment the version in
+package.json and tag and commit a release. Then `git push && git push --tags`
+this change so Travis CI can deploy to NPM. _Do not run `npm publish` directly._
+Once published, add [release notes](https://github.com/excitement-engineer/graphql-iso-date/tags).
+Use [semver](http://semver.org/) to determine which version part to increment.
+
+Example for a patch release:
+
+```sh
+npm test
+npm version patch
+git push --follow-tags
+```