Fixes
- Quote the constraint name in the MySQL
DROP FOREIGN KEYstatement. Names that are not bare identifiers previously produced invalid SQL — whitespace in a name (cakephp/phinx#924) or numeric names auto-assigned by MariaDB 12.x (DROP FOREIGN KEY 1) would fail with a syntax error. The identifier is now quoted viaquoteColumnName(), matching the Postgres and SQL Server adapters.
Full Changelog: 5.2.0...5.2.1