Brip

* Starting from version 0.2.*, `brip` changed its project name on PyPI. Now you install it by `pip install brip`. (If you need to upgrade from the old 0.1.0 version, please run `pip uninstall brython-brip` first.)
* The brip 0.2.0 and brip 0.2.1's [dependency on pip 21.1+ caused unnecessary trouble while installing on Windows](https://github.com/rayluo/easter/issues/1). We choose to drop that dependency since this patch release.

* Starting from version 0.2.*, `brip` changed its project name on PyPI. Now you install it by `pip install brip`. (If you need to upgrade from the old 0.1.0 version, please run `pip uninstall brython-brip` first.)
* The brip 0.2.0 released yesterday should have a dependency on pip 21+. We declare that dependency correctly in this patch release.

* Starting from this version, `brip` changes its project name on PyPI. Now you install it by `pip install brip`. (If you need to upgrade from the old 0.1.0 version, please run `pip uninstall brython-brip` first.)
* Support Brython 3.7.5+
* Adopt a new pip behavior coming soon at pip 21.3
* Refine README

Initial release, supporting `brip install` and `brip list`.