Introduce custom cache client support.

Introduce InsertFunc, UpdateFunc, and DeleteFunc options.

Introduce work unit caching.

Dependency upgrades to address vulnerability alerts.

Dependency upgrades to address vulnerability alerts.

Update go documentation badge to leverage pkg.go.dev. (#54)

Rename 'RetryType' to 'UnitRetryType'. (#42)

Introduce actions and concurrency support.

Introduce support for modules.

Fixes issue caused when using work units without metric scopes.