Update README.md

Author: Orta Therox

README.md

@@ -136,6 +136,16 @@ For JSPM users:
 }
 ```
 
+## Deployment
+
+- Choose your new version number
+- Set it in `package.json` and `bower.json`
+- Create a tag: `git tag [version]`
+- Push the tag: `git push --tags`
+- Create a [release in GitHub](https://github.com/microsoft/tslib/releases)
+- Run the [publish to npm](https://github.com/microsoft/tslib/actions?query=workflow%3A%22Publish+to+NPM%22) workflow
+
+Done.
 
 # Contribute