Drift 2.31.0

• In step-by-step migrations, automatically throw an error if a database downgrade is attempted. This has always been unsupported, but could lead to the database silently having a wrong user_version.
• Fix JSON serialization for views referencing a nullable wrapper of a non-nullable column with a type converter attached to it.

sqlparser version 0.43.1

• Support parsing DROP, VACUUM, REINDEX, ATTACH, DETACH, SAVEPOINT, RELEASE, ROLLBACK, ANALYZE, PRAGMA and ALTER TABLE statements.
• Add SchemaBuffer class to apply ALTER TABLE and DROP statements to CREATE statements.