Previously, the event's `time` property could be either a string or a date.
this commit modifies that to ensure that the object can only be created with
a timestamp in string format. As long as the string is a valid date, that
can be parsed by `new Date(Date.parse(str))` then whenever the event is
serialized as JSON, the `time` attribute will be formatted as per RFC 3339.
Fixes: https://github.com/cloudevents/sdk-javascript/issues/326
Signed-off-by: Lance Ball <lball@redhat.com>
BREAKING CHANGE:
* Extension names are now validated during object creation. The values are defined by the specification, and can be lowercase(a-z) or digits(0-9) and must be no longer that 20 characters
Signed-off-by: Lucas Holmquist <lholmqui@redhat.com>
BREAKING CHANGE:
* This change makes the CloudEvent Read-only and validates the input during object creation.
* To augment an already created CloudEvent object, we have added a `cloneWith` method that takes attributes to add/update.
Signed-off-by: Lucas Holmquist <lholmqui@redhat.com>