Smodels

Major novelties include:
* support for width-dependent results
* introduction of particle class
* introduction of model class

See the [what's new](https://smodels.readthedocs.io/en/latest/ReleaseUpdate.html) for more details

*This version is only compatible with the database version 2.0 and later.*

Added new LLP results, including searches for disappearing tracks (ATLAS-SUSY-2016-06) and displaced jets (CMS-EXO-19-001).

Database URL: https://smodels.github.io/database/official200
Database URL including Fastlim results: https://smodels.github.io/database/official200_fastlim
Note: these URLs can only be used with SModelS v2.0 or later

This is a beta version.
Added new LLP results, including searches for disappearing tracks (ATLAS-SUSY-2016-06) and displaced jets (CMS-EXO-19-001).

Database URL: https://smodels.github.io/database/official200-beta
Database URL including Fastlim results: https://smodels.github.io/database/official200-beta_fastlim
Note: these URLs can only be used with SModelS v2.0 or later

SModelS version 1.2.4.post2 fix:

* small change for the case of no experimental results in slha printer

Added 3 new ATLAS Run-2 results with full likelihoods using [pyhf](https://scikit-hep.org/pyhf/) and included small fixes in the database.
Database URL: https://smodels.github.io/database/official124
Database URL including Fastlim results: https://smodels.github.io/database/official124_fastlim
Note: these URLs can only be used with SModelS v1.2.4 or later

Added more than 20 new Run-2 results.
Database URL: https://smodels.github.io/database/official123
Database URL including Fastlim results: https://smodels.github.io/database/official123_fastlim
Note: these URLs can only be used with SModelS v1.2 or later