v2.2.1: Fix Gurobi interface

[stephane-caron]

This patch release updates to qpsolvers v4.3.1 which fixes a bug in the Gurobi interface. Thanks @563925743 👍

Changed

• Update qpsolvers to v4.3.1 to fix the Gurobi interface

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This discussion was created from the release v2.2.1.