chore: Update examples to use latest sdk changes

[lholmquist]

Signed-off-by: Lucas Holmquist lholmqui@redhat.com

Proposed Changes

• This PR updates the examples to use the latest cloudevents module(3.x)

All the examples work except one curl statement in the express example that is being addressed by #284 and since we are using the ~ those changes will get picked up once a new patch version is released, automatically

Description

• Fixes Issue Update examples with latest changes to extensions #249
• Version:

[lholmquist]

I noticed something with the express example. The last curl statement for v03 fails with an "Invalid Payload" error.

A Binary One with Base 64 Encoding

curl -X POST \
     -d'@../payload/data-1.txt' \
     -H'Content-Type:application/json' \
     -H'ce-specversion:0.3' \
     -H'ce-type:com.github.pull.create' \
     -H'ce-source:https://github.com/cloudevents/spec/pull/123' \
     -H'ce-id:45c83279-c8a1-4db6-a703-b3768db93887' \
     -H'ce-time:2019-06-21T17:31:00Z' \
     -H'ce-datacontentencoding:base64' \
     http://localhost:3000/

If you remove that ce-datacontentencoding header, it will work, but I don't think that is the right approach. The error is happening during this section of code: https://github.com/cloudevents/sdk-javascript/blob/master/src/event/spec.ts#L33, when testing if the data is Binary. but at this point, the data, at least in the example, is an object, so that check fails

@lance thoughts?

[lance]

@lholmquist interesting... I've worked out what the problem is. See #284. I've got a fix, but need to add tests and check behavior with the structured receiver as well.

[lance]

@lholmquist ok I have pushed a PR for a fix. I don't think that this deserves a quick version bump because it only affects encoded data on v0.3 events.