trackbone: 2.2.3 -> 2.3.0
Breaking changes:
- exec.#Run.wait has been renamed to exec.#Run.background.
Improvements:
- exec.#Run working dir is set to the temporary dir used to run configurations.
- random.#AvailablePort is safe to use concurrently.
- the port range can be configured in random.#AvailablePort with min and max fields.
- output attributes (@write_output, @read_output) can be used on hidden fields.