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.
- 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.
