sqlite alter column should list changes

[kelbyfaessler]

When you attempt to change the column type in a sqlite schema, then generate a migration file, this is the result:

/*
 SQLite does not support "Changing existing column type" out of the box, we do not generate automatic migration for that, so it has to be done manually
 Please refer to: https://www.techonthenet.com/sqlite/tables/alter_table.php
                  https://www.sqlite.org/lang_altertable.html
                  https://stackoverflow.com/questions/2083543/modify-a-columns-type-in-sqlite3

 Due to that we don't generate migration automatically and it has to be done manually
*/

That's fine, I'd prefer if you generated the SQL for me but I guess I can do it manually.

But it'd be nice if the comment included the changes that must be completed manually. For example, change column <xyz> from type <x> to type <y>