• #259: Optionally change the internal database dump path via "borgmatic_source_directory" option
  in location configuration section.
• #271: Support piping "borgmatic list" output to grep by logging certain log levels to console
  stdout and others to stderr.
• Retain colored output when piping or redirecting in an interactive terminal.
• Add end-to-end tests for database dump and restore. These are run on developer machines with
  Docker Compose for approximate parity with continuous integration tests.