v4.0.1 Release

Thanks @jjatie, 4.0.1 release brings:

Support Swift Package Manager and switch to another Snapshot test framework.

Use Github Actions instead of Travis CI to run faster and work around Carthage issues against Xcode12.

Snapshot UT now supports Apple Silicon.

Adopt Swift-Algorithm crafted by Apple and the community.

Full changelog

We have merged our long waited 4.0 branch into master. It adopts latest Swift trends and benefits and more flexbile and More swift!

This is a huge release as a lot of APIs have changed and adopted new protocols. So please expect it will break your code especially about the collection protocols. We will add a few Pull requests in the near future such as https://github.com/danielgindi/Charts/pull/4411.

The pre-release could last a little bit longer since we don't want to push people to update. But we do encourage people to try it out and give us feed back.