lib: remove specversion from the attributes in receiver.accept() (#207)
lib: remove specversion from the attributes in receiver.accept() (#207)

* lib: remove specversion from the required attributes in receiver.accept()

The `HTTPReceiver` class' `accept()` method should not have a typescript
type designation of `{ specversion: string }` for the `body` parameter
because the event could (and often is) in binary form, which means that
the `specversion` property won't be there.

This commit changes the method signature to:

`accept(headers: {}, body: {}) : CloudEvent`

Signed-off-by: Lance Ball <637094cbcafd6c4c397ebad24eca1a25fa2cf312@redhat.com>
cloudevents/sdk-javascript,cloudevents/sdk-javascript