* Improve the way packages are installed
* Add support for parallelized operations
* Improve the Chooser class
* Make the new installer the default
* Add an Authenticator class to be able to download from protected urls
* Adapt code and tests to latest changes
* Update lock file and some dependencies
* Improve installations information and caching
* Make the final adjustments and tests for the new installer
* Use the preview version of Poetry for the CI
* Rename Executor.run() to Executor.run_pip()
* Gracefully handle errors when executing operations
