Prep for v1.50.0

[odow]

Basic

• version field of Project.toml has been updated
  - If a breaking change, increment the MAJOR field and reset others to 0
  - If adding new features, increment the MINOR field and reset PATCH to 0
  - If adding bug fixes or documentation changes, increment the PATCH field

Documentation

• Add a new entry to docs/src/changelog.md, following existing style

Tests

• https://github.com/jump-dev/MathOptInterface.jl/actions/runs/22469911691
• https://github.com/jump-dev/MathOptInterface.jl/actions/runs/22552654022
• https://github.com/jump-dev/MathOptInterface.jl/actions/runs/22651889251
• If new tests were added, ensure that MOI.Test.version_added is implemented.

PRs

• Modify vector constraints for MatrixOfConstraints #2977

[odow]

Okay, this is now ready.

[odow]

It's baaaack. But now in the reverse case. I don't know what's going on. Seems like cholesky is super flakey between Julia versions.

[odow]

We should resolve #2965 before tagging.

[odow]

Thoughts @blegat?

[blegat]

Let's add support for modifying vector constraint in MatrixOfConstraints and then merge ? 😇

[odow]

Yip, lots of things have been piling up here.

[blegat]

Maybe we should do a new solver test as well

[odow]

https://github.com/jump-dev/MathOptInterface.jl/actions/runs/23334872222

[blegat]

It will maybe fail because modifying coefficients zeros in #2975 breaks the assumption that extract_function returns canoncalized function. This is fixed in #2977

[odow]

https://github.com/jump-dev/MathOptInterface.jl/actions/runs/23414737666