https://docs.github.com/en/free-pro-team@latest/actions/reference/context-and-expression-syntax-for-github-actions#github-context
t() :: %Action.Github{ client: Tentacat.Client.t(), event: map(), event_name: binary(), repository_name: binary(), repository_owner: binary(), result: term(), sha: binary(), state: atom() }
init(binary() | nil) :: {:ok, t()} | {:error, binary() | atom()}