Hyperspy-gui-ipywidgets

* Improve rendering changelog on github and fix hyperlinks in `README.md` ([41](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/41)).
* Speed up import time by importing submodules lazily and drop support for python 3.6 ([40](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/40)).
* Add python 3.10 to github CI and update github actions versions ([42](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/42)).
* Add GUI for the calibration method of signal2D ([2](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/2))

The is a minor release

* Add iterpath to fit component GUI ([36](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/36)).
* Add support for ipywidgets development version 8.0 ([35](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/35)).
* Make axes gui compatible with non-unform axis ([34](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/34)).
* Use GitHub Actions to run the test suite and make release ([33](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/33)).
* Fix ipywidgets requirement (>=7.0) ([32](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/32)).
* Improve README.md ([31](https://github.com/hyperspy/hyperspy_gui_ipywidgets/pull/31)).