v0.4.0

This is a major release with an important upgrade of the dependencies (requires Python 3.7+ and SciPy 1.7+), several enhancements in existing function and a new function to test the equality of covariance matrices (pingouin.box_m). We recommend all users to upgrade to the latest version of Pingouin.

See the full changelog at: https://pingouin-stats.org/changelog.html#v0-4-0-august-2021