Copasi-basico

This release updates basico to work with the latest version of petab_select. All changes are in the backend, and do not influence how to perform model selection:

* [Model selection example](https://github.com/copasi/basico/blob/master/docs/notebooks/FAMOS_ModelSelection.ipynb)

This release upgrades the implementation of the PEtab select package to the latest version. Nothing on the external API has changed, for an example see:

* [FAMOS Model Selection](https://github.com/copasi/basico/blob/master/docs/notebooks/FAMOS_ModelSelection.ipynb)

This is a bug fix release silencing a misleading error message coming from the steady state task

This release adds access to the results of the Linear Noise Approximation Task. (it requires an `python-copasi > 4.44`). For an example of running the task see the:

* [LNA Task Example](https://basico.readthedocs.io/en/latest/notebooks/LinearNoiseApproximation.html)

Generally, the LNA is computed runing `run_lna` the optional argument `return_results` (default `False`) indicates whether the full result is returned, or only the status of the computation. To retrieve the results after a computation of the LNA the following methods may be used:

* `get_lna_status` returns the status of the last computation
* `get_lna_covariance_matrix` returns the full covariance matrix
* `get_lna_reduced_covariance_matrix` returns the reduced covariance matrix
* `get_lna_reduced_b_matrix` returns the reduced b Matrix
* `get_lna_solution` returns the tuple: `(status, covariance matrix, reduced covariance matrix, reduced b matrix)`

This issue changes the behavior when running time courses, obtaining values only at specified time points. Previously the first value might have been the first value specified or an earlier time point if the model was not currently at the time. This release changes that behavior to set the output start time to the first specified value.

Additionally, the previously private `collect_data` method can now be used to obtain values from the current model state using either display names or cns.

This resolves issue 61.

This is a bugfix release that fixes an issue that occurs if basico is used with the python-copasi package 4.45 and using optimisation constraints.