Micom

Fixed some dependency errors on older Python versions.

Port tests to cobrapy 0.25 and above. Fix an import error in workflows.core.

Suppresses some warning in annotations from cobrapy.

Fixes some CI and build issues.

Renames the `n_jobs` arguments to `threads` across the code base for consistency and
updates the arguments for `workflow`.

`workflow` now does not spawn a process for single-threaded runs, reducing overhead.

Fixes an issue where `workflow` would deadlock with pytest-cov.

Fixes an issue where an accumulation in warnings in spawned processes trips up
jupyter.