Update changelog.

CHANGES.rst

@@ -5,7 +5,11 @@ Cython Changelog
 0.29.16 (2020-0?-??)
 ====================
 
-* Avoid C compiler warning about unreachable code in ``prange()``.
+* Temporary internal variables in nested prange loops could leak into other
+  threads.  Patch by Frank Schlimbach.  (Github issue #3348)
+
+* Fix an unhandled C++ exception in comparisons.
+  Patch by David Woods.  (Github issue #3361)
 
 * Fix deprecated import of "imp" module.
   Patch by Matti Picus.  (Github issue #3350)
@@ -13,6 +17,8 @@ Cython Changelog
 * Avoid "undeclared" warning about automatically generated pickle methods.
   Patch by David Woods.  (Github issue #3353)
 
+* Avoid C compiler warning about unreachable code in ``prange()``.
+
 
 0.29.15 (2020-02-06)
 ====================