Wilson

This is a bug fix release correcting a problem with symmetry factors in flavour rotations affecting
- the `SMEFT`/`WET` matching
- the translation between the `Warsaw` and `Warsaw up` bases.

Improvements

- The `Wilson` class has a new interface to change configuration options. The only option so far is `smeft_accuracy` (see next point), but more options (e.g. to modify input parameters) will be added in the future. This feature was developed by peterstangl and DavidMStraub.
- The new option `smeft_accuracy` with possible values `'integrate'` or `'leadinglog'` allows to specify whether the SMEFT RGEs should be solved numerically by integration (more precise but slow) or in the leading logarithmic approximation (approximate but very fast). The former is the default. This option can be either set for an individual instance, e.g.
python
my_wilson = Wilson(...)
my_wilson.set_option('smeft_accuracy', 'leadinglog')

or as a default option for all future instances of `Wilson`,
python
Wilson.set_default_option('smeft_accuracy', 'leadinglog')

This feature was developed by peterstangl.
- Several updates to WCxf bases; see the [release notes of wcxf-python 1.4.4](https://github.com/wcxf/wcxf-python/releases/tag/v1.4.4)


Bugs fixed

- The symmetry factors already mentioned in the last release have been now consistently added in the SMEFT to WET matching and corrected in the SMEFT running. Unit tests have been added. Implemented by DavidMStraub and jasonaebischerGIT

Note on upgrading

There are new or updated dependencies. When upgrading via pip, these will be installed automatically.

Improvements

- Translation to and from the EOS basis now supports b→clν Wilson coefficients.
- More robust iterative determination of SM parameters when using SMEFT and more meaningful error messages (thanks to peterstangl!)

Bugs fixed

- `wilson.Wilson` does not fail anymore if the initial EFT is `'SMEFT'` and the basis different from `'Warsaw'` (e.g. `'Warsaw up'`)
- Errors in WET translators affecting the sector `'sd'` fixed
- Inconsistent treatment of b-flavoured operators in WET running below m_b corrected (numerical impact very small)
- Symmetry factors in renormalization group (RG) equations of WET and SMEFT added that account for the use of redundant bases in [1711.05270](https://arxiv.org/abs/1711.05270) and [1312.2014](https://arxiv.org/abs/1312.2014) vs. the non-redundant bases defined by [WCxf](https://arxiv.org/abs/1712.05298). This affects the RG mixing of certain four-quark and four-lepton operators

This is the first public release of the wilson package. The feature set corresponds to what is described in version 1 of the preprint [arXiv:1804.05033](https://arxiv.org/abs/1804.05033).