Dbt-common

Features

- Cache static objects between tests to accelerate integration runs. ([55](https://github.com/dbt-labs/dbt-common/issues/55))
- Added a new InvocationContext class for application context management. ([57](https://github.com/dbt-labs/dbt-common/issues/57))
- Add dataclass utility `Mergeable` ([58](https://github.com/dbt-labs/dbt-common/issues/58))

Under the Hood

- Clean up macro contexts. ([35](https://github.com/dbt-labs/dbt-common/issues/35))
- Change metadata_vars \`if not\` to \`if ... is None\` ([6073](https://github.com/dbt-labs/dbt-common/issues/6073))
- Inject TagIterator into BlockIterator for greater flexibility. ([38](https://github.com/dbt-labs/dbt-common/issues/38))

Contributors
- [truls-p](https://github.com/truls-p) ([#6073](https://github.com/dbt-labs/dbt-common/issues/6073))