This patch documents that the `plugin` config option is an override, not
a merge with the default. This is significant, for example, if you
customise the github plugin as it will then prevent npm publishing by
default unless the npm plugin is also defined manually.
In case multiple plugins with a `analyzeCommits` step are configured, all of them will be executed and the highest release type (`major` > `minor`, `patch`) will be used.
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.
BREAKING CHANGE: Committing or creating files in the `publish` plugin hook is not supported anymore and now must be done in the `prepare` hook
Plugins with a `publish` hook that makes a commit or create a file that can be committed must use the `prepare` hook.
- Allow `publish` plugins to return an `Object` with information related to the releases
- Add the `success` plugin hook, called when all `publish` are successful, receiving a list of release
- Add the `fail` plugin hook, called when an error happens at any point, receiving a list of errors
- Add detailed message for each error
- Remove the `getLastRelease` plugin type
- Retrieve the last release based on Git tags
- Create the next release Git tag before calling the `publish` plugins
BREAKING CHANGE: Remove the `getLastRelease` plugin type
The `getLastRelease` plugins will not be called anymore.
BREAKING CHANGE: Git repository authentication is now mandatory
The Git authentication is now mandatory and must be set via `GH_TOKEN`, `GITHUB_TOKEN`, `GL_TOKEN`, `GITLAB_TOKEN` or `GIT_CREDENTIALS` as described in [CI configuration](https://github.com/semantic-release/semantic-release/blob/caribou/docs/usage/ci-configuration.md#authentication).
