Update CHANGELOG.rst for v2.0

Author: vivekjoshy

CHANGELOG.rst

@@ -4,6 +4,23 @@ This file is updated every release since v1.0.0 with the use of towncrier from t
 
 .. towncrier release notes start
 
+Openskill 2.0.0 (2022-02-20)
+============================
+
+Breaking Changes
+----------------
+
+- The ``rate`` function now returns ``Rating`` objects. (`#46 <https://github.com/OpenDebates/openskill.py/issues/46>`_)
+- Changes ``ordinal`` to accept both ``Rating`` objects and lists or tuples of 2 floats. (`#46 <https://github.com/OpenDebates/openskill.py/issues/46>`_)
+
+
+Features
+--------
+
+- Add a function to predict draws. (`#45 <https://github.com/OpenDebates/openskill.py/issues/45>`_)
+- ``create_rating`` now checks if the argument is the correct type. (`#46 <https://github.com/OpenDebates/openskill.py/issues/46>`_)
+
+
 Openskill 1.0.2 (2022-02-09)
 ============================