What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
This bug add new diagnostics for the preserve. keyword. This indicates when preserve appears outside of a trigger body. This pr also fixes #68 where it was reported as an error when a return would appear inside trigger.
preserve.keyword. This indicates when preserve appears outside of a trigger body. This pr also fixes #68 where it was reported as an error when areturnwould appear inside trigger.