----- * Gurobi can now serialize its configuration correctly. This also fixes pickling of Gurobi models. * Fix the shim for integrality tolerance in OSQP which makes it easier to clone OSQP Models to other solvers. * Fix an issue where one could not rename variables in Gurobi version 9.
1.5.1
----- * GLPK now respects `Configuration.tolerances.integrality` again
1.5.0
----- * removed support for Python 3.5 * added support for Python 3.9 * enabled code coverage in tox * support symengine 0.7.0 * add [OSQP](https://github.com/oxfordcontrol/osqp) as additional solver * add [cbc](https://github.com/coin-or/python-mip) as additional solver
1.4.7
----- * fix: except AttributeError when setting tolerance on cloned Configuration * enable cloning models between solver interfaces that do not support the same set of tolerance parameters