Events utility is out of date

[inlined]

Expected Behavior

The request encoding of events should conform to Cloud Events 0.1 (to be ratified 2018-04-20).

Actual Behavior

The request encoding does not use the CE- prefix for headers, support %encoding, nor support the "Structured" encoding format approved in 2018-04-19

Steps to Reproduce the Problem

1. Read https://github.com/cloudevents/spec
2. Read pkg/events

Additional Info

[inlined]

/assign inlined@

[inlined]

Fixed in #53.