event.json has placeholder values, and incorrect & inconsistent ver…

…sion values.

It only seems to be used for testing with `act`. `event.json` should either be generated or be manually created; in either case, it should reside somewhere that is ignored by git, as the only source of version info in git should be version tags.

Partial mas-cli#638

Signed-off-by: Ross Goldberg <[email protected]>