Added author and changed log entry

Sophia Lilleengen · adrn · commit 45d04e0a0121 · 2022-06-30T16:56:46.000-04:00
diff --git a/AUTHORS.rst b/AUTHORS.rst
@@ -8,6 +8,7 @@ All contributors (alphabetical last name):
 * Akeem Hart
 * Sergey Koposov
 * Daniel Lenz
+* Sophia Lilleengen
 * Pey Lian Lim
 * Syrtis Major
 * Semyeong Oh
diff --git a/CHANGES.rst b/CHANGES.rst
@@ -19,6 +19,8 @@ New Features
 
 - Added a ``plot_rotation_curve()`` method to all potential objects to make a 1D plot
   of the circular velocity curve.
+  
+- Added a new potential for representing multipole expansions ``MultipolePotential``.
 
 Bug fixes
 ---------
