- Add a new plugin type: `publish` - Add support for multi-plugin. A plugin module can now return an object with a property for each plugin type - Uses by default [npm](https://github.com/semantic-release/npm) and [github](https://github.com/semantic-release/github) in addition of Travis for the verify condition plugin - Uses by default [npm](https://github.com/semantic-release/npm) and [github](https://github.com/semantic-release/github) for the publish plugin - `gitTag` if one can be found is passed to `generateNotes` for both `lastRelease` and `nextRelease` - `semantic-release` now verifies the plugin configuration (in the `release` property of `package.json`) and throws an error if it's invalid - `semantic-release` now verifies each plugin output and will throw an error if a plugin returns an unexpected value. BREAKING CHANGE: `githubToken`, `githubUrl` and `githubApiPathPrefix` have to be set at the [github](https://github.com/semantic-release/github) plugin level. They can be set via `GH_TOKEN`, `GH_URL` and `GH_PREFIX` environment variables. BREAKING CHANGE: the `npm` parameter is not passed to any plugin anymore. Each plugin have to read `.npmrc` if they needs to (with https://github.com/kevva/npm-conf for example).