- Update to 1.6.0
  ## General
  * Following NEP 29, the minimum required Numpy is now 1.20.
    [#1442]
  * The minimum required Matplotlib is now 3.3.0. [#1442]
  * The minimum required scikit-image is now 0.18.0. [#1442]
  * The minimum required scikit-learn is now 1.0. [#1442]
  ## New Features
  ### photutils.aperture
  * The ApertureStats class now accepts astropy NDData objects as
    input. [#1409]
  * Improved the performance of aperture photometry by 10-25%
    (depending on the number of aperture positions). [#1438]
  ### photutils.psf
  * Added a progress bar for fitting PSF photometry [#1426]
  * Added a subshape keyword to the PSF-fitting classes to define
    the shape over which the PSF is subtracted. [#1477]
  ### photutils.segmentation
  * Added the ability to slice SegmentationImage objects. [#1413]
  * Added mode and fill_value keywords to SourceCatalog
    make_cutouts method. [#1420]
  * Added segment_area source property and wcs, localbkg_width,
    apermask_method, and kron_params attributes to SourceCatalog.
    [#1425]
  * Added the ability to use Quantity arrays with detect_threshold,
    detect_sources, deblend_sources, and SourceFinder. [#1436]
  * The progress bar used when deblending sources now is prepended
    with “Deblending”. [#1439]
  * Added “windowed” centroids to SourceCatalog. [#1447, #1468]
  * Added quadratic centroids to SourceCatalog. [#1467, #1469] (forwarded request 1044299 from bnavigator)

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