emsig/emg3d: tol_gradient isfinite

New hard dependency: empymod changed from being a soft dependency to being a hard dependency.

Simulation

• A new parameter tol_gradient can be provided in the dict solver_opts; by default it is set to the value of tol. tol is the value used for compute (the forward), tol_gradient is used for gradient/jtvec and jvec (the gradient). In inversions, one can set the tolerance for the gradient often to a lower value, which saves computation time.

Survey

• New attributes isfinite and finite_data. Former returns the indices of the finite data, latter returns directly the finite data.

Electrodes

• Fixed TxMagneticDipole-representation and improved documentation of the magnetic sources.

Maintenance:

• Bumped the minimum requirements to:

  • Python 3.9
  • SciPy 1.9
  • Numba 0.53
  • empymod 2.3.0 (NEW requirement)

• Testing: added Python 3.12, dropped Python 3.8.

• Fix remaining outdated python setup.py commands.

• Many small things to keep the package updated.