Hyperspy-gui-traitsui

* Fix import tools error when running hyperspy test suite ([47](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/47))

* Add `is_binned` to axis GUI, make index of the navigation axis editable ([39](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/39)).
* Fix loading GUI ([38](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/38)).
* Improve rendering changelog on github and fix hyperlinks in `README.md` ([42](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/42)).
* Speed up import time by importing submodules lazily and drop support for python 3.6 ([41](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/41)).
* Add python 3.10 to github CI and update github actions versions ([43](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/43)).
* Fix traistui deprecation warning and add oldest supported version of dependencies build to github CI ([45](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/45))
* Add GUI for the calibration method of signal2D ([3](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/3))

The is a minor release:

* Fix closing contrast editor tool ([35](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/35)).
* Add iterpath to fit component GUI ([34](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/34)).
* Make axes gui compatible with non-unform axis ([25](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/25)).
* Use GitHub Actions to run the test suite and make release ([32](https://github.com/hyperspy/hyperspy_gui_traitsui/pull/32)).