Cloudevents format v1.0.
t() :: %Cloudevents.Format.V_1_0.Event{ data: any() | nil, datacontenttype: String.t() | nil, extensions: %{optional(String.t()) => any()} | nil, id: String.t(), raw: any() | nil, source: String.t(), specversion: String.t(), subject: String.t() | nil, time: String.t() | nil, type: String.t() }