Highs osqp - #570
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HiGHS can be used via a new optlang interface, primarily for LPs OSQP is now used in make_scenario_feasible when neither CPLEX nor Gurobi are available various minor GUI improvements
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Added an optlang interface for the HiGHS solver so that this solver can be used for FBA in CNApy. For now the interface is in the CNApy repository but it is planned to add it to the optlang repository.
QP's in the make_scenario_feasible function can now solved by a dedicated function via the OSQP solver independent of the cobrapy model. At present, OSQP, is much better for QPs than HiGHS or SCIP, but not as good as CPLEX. The OSQP path is therefore only used when neither CPLEX nor Gurobi is the active solver.