v1.1.16

Changelog:

• Support for Gurobi Environments (#1445)
• Validate constraints on problem creation (#1463)
• Fix SCS requirement issue (Issue #1474) (#1481)
• Fixes for DQCP (#1484)
• [CI] Build cvxpy-base (Issue 1478) (#1485)
• More types (#1389)
• Sort imports (#1488)
• Improved handling of solver import errors (#1498)
• Add pre-commit config (#1507)
• Improve solver inheritance (#1509)