Release v1.3.0

Changes for v1.3.0

• Fixed an issue when testing Firebird on a host with Firebird installed but no isql, and when using a local Firebird (e.g., the Engine12 provider), which allows only one connection at a time. Thanks to Slaven Rezić for the the reproducible configuration (#597).
• Tweaked the Postgres engine to support Yugabyte. The only unsupported features are explicit locks, so users need to manually ensure that only one instance of Sqitch is updating the cluster at a time.
• Added support for CockroachDB. Almost exactly the same as for Postgres, so the new App::Sqitch::Engine::cockroach class extends App::Sqitch::Engine::pg to make a few changes. The SQL files with the registry DDL varies in a few ways, so they're separate.
• Now require URI::db v0.20 for Cockroach and Yugabyte URI support.
• Dropped support for MySQL 5.0.
• Added explicit sorting for aggregated lists (such as the tags associated with a commit) to the MySQL, Exasol, Snowflake, and Postgres (8.4 and higher) engines.
• Fixed slow deploys on MariaDB thanks to fractional timestamp support added in 5.03.05. Thanks to @rbrigot for the PR (#658)!
• Fixed a bug where destination locking failed on the first deploy to MySQL. Bug introduced along with destination locking in v1.2.0. Thanks Tom Bloor the report and to Alberto Simões for the help replicating the issue (#601).
• Removed the sqitch engine update-config action, originally added for compatibility reasons in 2014, and the prompt to use it was removed as of 0.9999 in 2019.
• Fixed a warning when searching for the Firebird client on Windows.