chore: change tags, date, modified fields to comply with v2 of the Sigma spec.
chore: update the related type from `obsoletes` to `obsolete`.
chore: update local json schema to the latest version.
Correct a number of rules where message or keyword were incorrectly used
as field names in events (typically windows event logs). However, neither
field actually exists and as such these strings could never match.
Nasreddine Bencherchali