Use row-level locking to operate underlying table

Use row-level locking to handle database operations (#118)

* pglock: remove unnecessary transaction to execute heartbeats

* pglock: remove unnecessary transaction to execute releases

* pglock: remove unnecessary transaction to execute lock acquisitions

Improve retry on transaction deadlocks; upgrade test dependency

Fix deadlock retrier (#117)

* pglock: speed up retries on transaction deadlocks

* pglock: upgrade pgx version used for testing

Improve log verbosity

v1.14.2

pglock: not log context cancelation on heartbeats (#94)

Fix logs

v1.14.1

pglock: fix logs

Add support for structured logging (`log/slog`)

pglock: add support for leveled logs

Closes #55

Improve overall correctness around Heartbeat

• Skip release lock on transient heartbeat problems
• Use CYCLE on sequence used for RVN
• Added linters

Improve correctness of Release()/Close()

v1.12.0

pglock: unify lock release logic between client.Release() and lock.Cl…

Improve correctness of `Do()` call

pglock: enforce releasing the lock before stopping heartbeats

Closes #36

Improve throughput

Grab RVN out of the transaction

Thanks @dkhenry

Improve support for jackc/pgx

pglock: improve error handling to also handle jackc/pgx

Closes #29