Use LSMR solves by default. See this PR for more info

For CVXPYlayers purposes

Needed to bump diffqcp version in the toml. Also took the opportunity to loosen Python requirement to >=3.12 to match CVXPYlayers requirement.

Why are tomls so hard?

Release after the feature and packaging updates from this PR.

The big changes are:

• Direct solver support.
• Exponential cone support.
• Packaging bugfix
• Option to install diffqcp onto a device with no GPU

Intermediate release before adding nvmath solvers. Primary goal is to fix the Module not found error so that we can continue integrating diffqcp into the 1.0 branch of CVXPYlayers. Included in this release will be power cone support and (I think) PSD cone support since v0.2 failed to deploy to PyPi.

Updates docs and adds PSD support

Full Changelog: v0.1...v0.2

Initial Release