v0.27.0

New on this version

Use it with:

• linna/framework until the version v0.27.0.
• linna/auth-mapper-pgsql until the version v0.2.1.
• linna/auth-mapper-mysql until the version v0.2.1.

Added

* `linna_db_mysql.sql` file
* `linna_db_mysql_test.sql` file
* `linna_db_pgsql.sql` file
* `linna_db_pgsql_test.sql` file