Updated to take advantage of ``gvar.regulate`` from version 11.6 of the ``gvar`` module.
11.5.3
Minor fix for compatibility with ``gvar`` v11.5.2.
11.5.2
Fixes bug in parallel fits when using ``lsqfit.MultiFitter``.
11.5.1
Small improvement in how ``p0`` is handled when using ``MultiFitter`` -- responds to a feature request.
11.5
nonlinear_fit`` objects modified so they can be archived using ``gvar.dump``.
11.4
Minor bug fix for fit residuals, and new diagnostic tool: `fit.qqplot_residuals().show()` displays a Q-Q plot of the normalized residuals to check that they have a Gaussian distribution.