0.4.0

Added

• cairo-coverage clean command to remove all generated files. This is useful as by default, if a coverage report
  already exists, the new report is appended to it. So if you want to start fresh, you can use this command.

Changed

• cairo-coverage is now up to 2x faster. This is achieved by using multiple threads
• cairo-coverage must be called within a scarb-managed workspace as now it uses scarb metadata to infer the project
  root directory
• .cairo-coverage-ignore file now is only accepted in the project root directory