feat: add helpers for postgres advisory locks

[ForbesLindesay]

No description provided.

[rollingversions]

@databases/pg (5.5.0 → 5.6.0)

New Features

• Add utility methods for getting advisory locks in transactions:

  • Transaction.advisoryTxLock(key) - get an exclusive lock on a key, waiting if it's not available.
  • Transaction.advisoryTxLockShared(key) - get a shared lock on a key, waiting if it's not available.
  • Transaction.tryAdvisoryTxLock(key) - get an exclusive lock on a key, if it's available.
  • Transaction.tryAdvisoryTxLockShared(key) - get a shared lock on a key, if it's available.

Packages With No Changes

The following packages have no user facing changes, so won't be released:

• @databases/bigquery
• @databases/cache
• @databases/connection-pool
• @databases/dataloader
• @databases/escape-identifier
• @databases/expo
• @databases/lock
• @databases/migrations-base
• @databases/mock-db
• @databases/mock-db-typed
• @databases/mysql
• @databases/mysql-config
• @databases/mysql-schema-cli
• @databases/mysql-schema-introspect
• @databases/mysql-schema-print-types
• @databases/mysql-test
• @databases/mysql-typed
• @databases/pg-bulk
• @databases/pg-cluster
• @databases/pg-config
• @databases/pg-connection-string
• @databases/pg-create
• @databases/pg-data-type-id
• @databases/pg-errors
• @databases/pg-migrations
• @databases/pg-schema-cli
• @databases/pg-schema-introspect
• @databases/pg-schema-print-types
• @databases/pg-test
• @databases/pg-typed
• @databases/push-to-async-iterable
• @databases/queue
• @databases/shared
• @databases/shared-print-types
• @databases/split-sql-query
• @databases/sql
• @databases/sqlite
• @databases/sqlite-sync
• @databases/validate-unicode
• @databases/website
• @databases/websql
• @databases/websql-core
• @databases/with-container

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