Version 0.6.0 (2021-09-09)

This is a minor version with new features, bug fixes, deprecations,
and documentation improvements.

New Features

Added goldindec to pybaselines.polynomial, which uses a non-quadratic cost
function with a shrinking threshold to fit the baseline.
Added the morphological penalized spline (mpspline) algorithm to
pybaselines.morphological, which uses morphology to identify baseline points
and then fits the points using a penalized spline.
Added the derivative peak-screening asymmetric least squares algorithm (derpsalsa)
to pybaselines.whittaker, which includes additional weights based on the first and
second derivatives of the data.
Added the fastchrom algorithm to pybaselines.classification, which identifies baseline
points as where the rolling standard deviation is less than the specified threshold.
Added the module pybaselines.spline, which contains algorithms that use splines
to create the baseline.
Added the mixture model algorithm (mixture_model) to pybaselines.spline, which uses
a weighted penalized spline to fit the baseline, where weights are calculated based
on the probability each point belongs to the noise.
Added iterative reweighted spline quantile regression (irsqr) to pybaselines.spline,
which uses penalized splines and iterative reweighted least squares to perform
quantile regression on the data.
Added the corner-cutting algorithm (corner_cutting) to pybaselines.spline, which
iteratively removes corner points and then fits a quadratic Bezier spline with the
remaining points.

Fixed an issue with utils.pad_edges when mode was "extrapolate" and extrapolate_window
was 1.

Increased the minimum SciPy version to 0.17 in order to use bounds with
scipy.optimize.curve_fit.
Changed the default extrapolate_window value in pybaselines.utils.pad_edges to
the input window length, rather than 2 * window length + 1.
Slightly sped up pybaselines.optimizers.adaptive_minmax when poly_order is
None by using the numpy array's min and max methods rather than the built-in
functions.

Renamed pybaselines.window to pybaselines.smooth to make its usage more
clear. Using pybaselines.window will still work for now, but will begin emitting
a DeprecationWarning in a later version (maybe version 0.8 or 0.9) and will
be removed shortly thereafter.
Removed the constant utils.PERMC_SPEC that was deprecated in version 0.4.1.
Deprecated the function pybaselines.morphological.optimize_window, which will
be removed in version 0.8.0. Use pybaselines.utils.optimize_window instead.