Add changelog

CHANGES.rst

@@ -1,6 +1,16 @@
 0.22.0 (unreleased)
 -------------------
 
+- Coordinate frames now have a "native" order and then are sorted based on ``axes_order``. [#457]
+
+- ``WCS.numerical_inverse`` no longer accepts high level objects (``with_units=`` is not supported) use ``WCS.inverse``. [#457]
+
+- ``CoordinateFrame.coordinates`` has been replaced by ``CoordinateFrame.to_high_level_coordinates`` [#457]
+
+- ``CoordinateFrame.to_quantity`` has been replaced by ``CoordinateFrame.from_high_level_coordinates``. [#457]
+
+- Inputs to ``CelestialFrame``, such as ``axes_names`` are now explicitly in lon, lat order and will re sorted based on ``axes_order=``. [#457]
+
 - Replace usages of ``copy_arrays`` with ``memmap`` [#503]
 
 - Fix an issue with units in ``wcs_from_points``. [#507]