Release v1.2.0

Changes for v1.2.0

• Fixed partitioned search for deployed changes on Oracle and Exasol to correctly support plans with more than 250 changes. Thanks to @Nicqu for the report (#521).
• DBI connections to the registry will now be set to trace level one when a verbosity level of three or higher is passed to Sqitch (i.e., sqitch -vvv). Thanks to @wkoszek for the suggestion (#155).
• Renamed the "master" branch to "main" and updated all relevant references.
• Fixed the parsing of the Snowflake account name from the target URL to that it no longer strips out the region and cloud platform parts. Also deprecated the use of the region, host, and port config and environment variables. This is to comply with the new account name format. Thanks to @ldsingh00 for the report (#544).
• The checkout command will now show a usage statement when no branch name is passed to it, rather than a series of warnings and a Git error. Thanks to François Beausoleil for the report (#561).
• The checkout command now works when operating on a Sqitch project in a subdirectory of a Git project. Thanks to François Beausoleil for the report and suggested fix (#560).
• Fixed a failing bundle test when a top directory was configured in the user or system configuration. Thanks to @CodingMinds for the spot (#587).
• Added support to the Exasol engine for the AUTHMETHOD query parameter (to allow Open ID authentication) and the SSLCERTIFICATE=SSL_VERIFY_NONE query parameter to disable SSL verification. Thanks to Torsten Glunde for the report (#588).
• Fixed "Use of uninitialized value $engine in concatenation" error when Sqitch is unable to determine the engine when writing a plan file. Only happens in the rare case that the core.engine value is not set.
• Improved the error message when attempting to update a plan file and no project pragma is present. Thanks to Laurentiu Diaconu for the report (#577).
• Fixed the error message when attempting to deploy a change that has already been deployed to display the name of the change, rather than a memory address. Thanks to Neil Mayhew for the report (#579).
• Added destination locking, currently implemented for PostgresQL and MySQL. On starting a deploy or revert, Sqitch attempts to "lock the destination" using advisory locks, to ensure that only one instance of Sqitch makes changes to the database at any one time. This complements the existing locking, which applies as each change is deployed or reverted, as that pattern led to failures when multiple instances of Sqitch were working at once. Thanks to Neil Mayhew for the report (#579).
• Added the --lock-timeout option to the deploy, revert, rebase, and checkout commands, to allow for shorter or longer times to wait for an exclusive target database advisory lock for engines that support it. Defaults to 60 seconds.
• Fixed the behavior of the plan command's --max-count option when used with --reverse to show the proper items. Thanks to Adrian Klaver for the report (#517).
• Fixed an issue that could cause bugs with the check command on Firebird, Exasol, Oracle, and Vertica. Broken since the check command was added in v1.1.0.