createTag method
Creates a new tag in a repository.
API docs: https://developer.github.com/v3/git/tags/#create-a-tag-object
Implementation
Future<GitTag> createTag(RepositorySlug slug, CreateGitTag tag) =>
github.postJSON('/repos/${slug.fullName}/git/tags',
convert: GitTag.fromJson,
statusCode: StatusCodes.CREATED,
body: GitHubJson.encode(tag));