- fixes platform's COMMENT ON statement support
- implements reverse engineering for column comments
- marks boolean column type commented for distinction

fixes #2182

fixes #1206

fixes #1339
closes #921

Features and changes:
* jsonb can be used with: options={"jsonb"=true}
* OVER is no longer reserved
* LATERAL is now reserved

On the MySQLPlatform::getDropForeignKeySQL table name will not be escaped if the name is passed instead of the object table itself.

Since the getLocalTableName use the localTable property the object is always available, there is no reason not to use it.

According to the comment

// deleting duplicated foreign keys present on both on the orphanedForeignKey
// and the removedForeignKeys from changedTables

A check must be had on the $removedForeignKey so it does point on the removed table. Currently it does unset all keys removal even the one pointing on other table.