Alphalens-reloaded

What's Changed

- updated tests to avoid warnings and address some errors
- src layout
- PEP 517/18
- setuptools_scm instead of versioneer

- Bump pypa/gh-action-pypi-publish from 1.4.1 to 1.4.2 by dependabot in https://github.com/stefan-jansen/alphalens-reloaded/pull/5
- Bump pypa/gh-action-pypi-publish from 1.4.2 to 1.5.0 by dependabot in https://github.com/stefan-jansen/alphalens-reloaded/pull/7
- Bump pypa/gh-action-pypi-publish from 1.5.0 to 1.6.4 by dependabot in https://github.com/stefan-jansen/alphalens-reloaded/pull/13

New Contributors
* dependabot made their first contribution in https://github.com/stefan-jansen/alphalens-reloaded/pull/5

**Full Changelog**: https://github.com/stefan-jansen/alphalens-reloaded/compare/v0.4.2...v0.4.3

- Makes `compute_forward_returns()` try to infer the frequency only if it's not set explicitly before that (1 )
- Updates GHA/CI (3 )
- Fixes tests breaking due to NumPy/pandas [DeprecationWarnings](https://github.com/numpy/numpy/issues/18281) (#4 )