…ces (#324)

* lib(messages): Implement a 4.0 Messages and other supporting interfaces

This commit introduces the Message, Serializer and Deserializer, and Binding
interfaces used to convert a CloudEvent into a Message that can be sent across
a transport protocol. The first protocol implemented for this is HTTP, and some
of the functionality formerly in src/transport/http has been simplified,
reduced and/or moved to /src/messages/http.

Test for V1 and V3 events are in place. Conformance tests have been modified to use
these new interfaces vs. the HTTP Receiver class.

Signed-off-by: Lance Ball <[email protected]>

* feat: add a constructor parameter for loose validation

This commit adds a second, optional boolean parameter to the `CloudEvent`
constructor. When `false` is provided, the event constructor will not
perform validation of the event properties, values and extension names.

This commit also modifies the ValidationError class so that the error message
string includes the JSON.stringified version of any schema validation
errors. It also makes the HTTP.toEvent() function create CloudEvent
objects with loose/no validation.

Incorporates comments from #328

Fixes: #325

Signed-off-by: Lance Ball <[email protected]>

Snyk has created this PR to upgrade cloudevents from 3.0.1 to 3.1.0.

See this package in npm:
https://www.npmjs.com/package/cloudevents

See this project in Snyk:
https://app.snyk.io/org/lance/project/cb2960b0-db0c-4e77-9ab2-e78efded812e?utm_source=github&utm_medium=upgrade-pr

Co-authored-by: snyk-bot <[email protected]>
Signed-off-by: Lucas Holmquist <[email protected]>

Signed-off-by: Philip Hayes <[email protected]>

Co-authored-by: Philip Hayes <[email protected]>