Update Python for CI (#315)

* Update Python for CI

* Fix Python 3.10

* Update numpy

* Update mypy

* Publish with 3.8

Update versioning system (#252)

* Draft for new versioning scheme

* Update build system

* Testing file

* Fix build error

* Use build

* Python version

* Importlib in Python 3.8

* Add back requirements_test.txt

* Rename

* Bad torch version

* Delete version file

* Ignore version

* No need to build

* Delete test requirements

* Apply isort

* Fix Python version

Add normalization options for FFT (#146)

* Add normalization options for FFT

* Harmonize function signatures

Update package for PyPI distribution (#143)

* Test the distribution build

* Updates for publishing to PyPI

* Update install instructions