docs: Release Guidelines (cloudevents#306)

* This adds a guide on how to do releases 

Signed-off-by: Lucas Holmquist <lholmqui@redhat.com>

Author: lholmquist

Diff for: RELEASE_GUIDELINES.md

@@ -0,0 +1,62 @@
+# Module Release Guidelines
+
+## Create a Proposal Issue
+
+To prepare for a new release, create a [new issue](https://github.com/cloudevents/sdk-javascript/issues/new?assignees=&labels=&template=feature-request.md&title=) where the title of the issue cleary reflects the version to be released.
+
+For example: "Proposal for 3.2.0 release", or something similar.  If you are not sure which version is the next version to be released, you can run `npm run release -- --dry-run` to find out what the next version will be.
+
+The body of the issue should be the commits that will be part of the release.  This can be easily accomplished by running a git log command with a defined **range**.  This range should start at the most recent version tag and end at the latest commit in the master branch.
+
+For example:
+
+```
+git log v3.0.1..upstream/master --oneline
+```
+
+This will output all the commits from the 3.0.1 tag to the latest commits in the remote upstream/master branch.
+
+This output should be pasted into the issue as normal text.  This will allow Github to magically turn all commit hashes and PR/Issues numbers to links.
+
+### Get Consensus
+
+Before a release can be finalized, other maintainers should give a +1 or a thumbs up or some other identifying mark that they are good with the changes.
+
+## Create and Publish the release
+
+Once consensus has been reached on the proposal it is time to create the release and publish it to npm.
+
+### Create the Release
+
+Creating the release is as simple as running the release script:
+
+```
+npm run release
+```
+
+This will update the CHANGELOG.md and create a new tag based on the version.  This can then be pushed upstream by doing:
+
+```
+git push upstream master --follow-tags
+```
+
+### Create the release on GitHub
+
+Once the release tag has been created and pushed up to Github, we should draft a new release using the Github UI, which is [located here](https://github.com/cloudevents/sdk-javascript/releases/new)
+
+* Tag Version should be the tag that was just created
+* The release title should be something like "VERSION Release"
+* And the Changelog entries for the current release should be copied/pasted into the comments
+
+
+### Publish to npm
+
+Once the new version has been created, we need to push it to npm.  Assuming you have all the rights to do so, just run:
+
+```
+npm publish
+```
+
+## Close the Issue
+
+Once the release has been completed, the issue can be closed.