feat: add success and fail notification plugins

- 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

lib/git.js

@@ -120,7 +120,6 @@ async function push(origin, branch) {
  *
  * @param {String} origin The remote repository URL.
  * @param {String} tagName The tag name to delete.
- * @throws {SemanticReleaseError} if the remote tag exists and references a commit that is not the local head commit.
  */
 async function deleteTag(origin, tagName) {
   // Delete the local tag