CVXPY 1.1.19 is a patch release (i.e., a bugfix release) in the 1.1.X release series. It's released concurrently with CVXPY 1.2.0, which has the same set of bugfixes as well as additional features. CVXPY 1.1.19 supports Python 3.6 to 3.10, while CVXPY 1.2.0 only supports Python 3.7 through 3.10. You can read about version 1.2.0 here.
The full set of changes between CVXPY 1.1.18 and 1.1.19 can be found in PR #1673.