Release v0 5

[afrittoli]

Changes

Prepare for release v0.5.0: update all the event versions and specversions to remove the -draft:

Events:

ls conformance | while read aa; do sp="$(echo ${aa%.*} | tr "_" ".")"; ./tools/event-version.sh -u $sp -e; done

Specversion:

/tools/spec-release.sh -e

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• Has the primer doc been updated if a design decision is involved
• Have the JSON schemas been updated if the specification changed
• Has spec version and event versions been updated according to the versioning policy
• Meets the CDEvents contributor standards

[xibz]