Release v0.6.0

This release refactors a common ground out of the previous mixins into a new mixin called withFit. By default, classes decorated with that mixin listen to their attributes (specified by a helper object) and use the values from there to render a lit-html function to their shadow DOM.

Redux is connected using a second mixin, connect. The redux mixin is responsible for connecting to redux and passing the derived props over to the withFit mixin for rendering.

The previously deprecated createStore function has now been removed and is fullly replaced by the withStore mixin.

The release also specifies lit-html and redux as peer dependency to simplify dependency resolution.