BREAKING CHANGE: this feature change the way semantic-release keep track of the channels on which a version has been released.
It now use a JSON object stored in a [Git note](https://git-scm.com/docs/git-notes) instead of Git tags formatted as v{version}@{channel}.
The tags formatted as v{version}@{channel} will now be ignored. If you have made releases with v16.0.0 on branches other than the default one you will have to update your repository.
The changes to make consist in:
- Finding all the versions that have been released on a branch other than the default one by searching for all tags formatted v{version}@{channel}
- For each of those version:
- Create a tag without the {@channel} if none doesn't already exists
- Add a Git note to the tag without the {@channel} containing the channels on which the version was released formatted as `{"channels":["channel1","channel2"]}` and using `null` for the default channel (for example.`{"channels":[null,"channel1","channel2"]}`)
- Push the tags and notes
- Update the GitHub releases that refer to a tag formatted as v{version}@{channel} to use the tag without it
- Delete the tags formatted as v{version}@{channel}
- Add only the most recent release to a channel (rather than adding all the one not added yet)
- Avoid attempting to ad the version twice in case that version is already present in multiple upper branches
- Allow to configure multiple branches to release from
- Allow to define a distribution channel associated with each branch
- Manage the availability on distribution channels based on git merges
- Support regular releases, maintenance releases and pre-releases
- Add the `addChannel` plugin step to make an existing release available on a different distribution channel
BREAKING CHANGE: the `branch` option has been removed in favor of `branches`
The new `branches` option expect either an Array or a single branch definition. To migrate your configuration:
- If you want to publish package from multiple branches, please the configuration documentation
- If you use the default configuration and want to publish only from `master`: nothing to change
- If you use the `branch` configuration and want to publish only from one branch: replace `branch` by `branches` (`"branch": "my-release-branch"` => `"branches": "my-release-branch"`)
- Allow to run semantic-release (via API) from anywhere passing the current working directory.
- Allows to simplify the tests and to run them in parallel in both the core and plugins.
Each `generateNotes` plugin will be called in the order defined and will receive the concatenation of the previous one in `nextRelease.notes`.
That gives each plugin the ability to test if there is a notes part that will precede it's own.
Each plugin is expected to return it's own part of the release notes only. **semantic-release** will take care of concatenating all the notes parts.
