* feat: add builtin HTTP emitter
Adds a builtin HTTP event emitter that can be used with `emitterFor()`
to send events over HTTP without pulling in any additional dependencies.
In the past we chose to keep this in our code base by considering axios a
peer dependency - users were required to include it in their projects
explicitly. In working on the HTTP emitter, it became more and more
apparent that the axios emitter was probably no longer needed, and in fact
I doubt it was really used at all. To use it, users would have been required
to do this, since it isn't exported at the top level.
const { axiosEmitter } = require("cloudevents/transport/http");
Based on this, I think the usage in the wild is probably very minimal,
and I like the idea of eliminating this dependency.
Signed-off-by: Lance Ball <lball@redhat.com>
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