DOC: Update change log for 1.16.4

Update changelog

Author: bashtage

doc/source/change-log.rst

@@ -1,11 +1,26 @@
 Change Log
 ----------
 
-Since v1.16.2
-=============
-- Added broadcasting to multinomial (see
+v1.16.4
+=======
+- Add a fast path for broadcasting :func:`~randomgen.generator.RandomGenerator.randint`
+  when using ``uint64`` or ``int64``.
+- Refactor PCG64 so that it does not rely on Cython conditional compilation.
+- Add :func:`~randomgen.generator.RandomGenerator.brng` to access the basic RNG.
+- Allow multidimensional arrays in :func:`~randomgen.generator.RandomGenerator.choice`.
+- Speed-up :func:`~randomgen.generator.RandomGenerator.choice` when not replacing.
+  The gains can be very large (1000x or more) when the input array is large but
+  the sample size is small.
+- Add parameter checks in :func:`~randomgen.generator.RandomGenerator.multinomial`.
+- Fix an edge-case bug in :func:`~randomgen.generator.RandomGenerator.zipf`.
+- Allow 0 for sample in :func:`~randomgen.generator.RandomGenerator.hypergeometric`.
+- Add broadcasting to :func:`~randomgen.generator.RandomGenerator.multinomial` (see
   `NumPy issue 9710 <https://github.com/numpy/numpy/pull/9710>`_)
 
+v1.16.3
+=======
+- Release fixing Python 2.7 issues
+
 v1.16.2
 =======
 - Updated Xoroshiro120 to use AUthor's latest parameterization
@@ -14,7 +29,7 @@ v1.16.2
 
     - ``random_raw``, which have been moved to the individual basic RNGs
     - ``random_uintegers``, which can be replaced with
-      :func:`~randomgen..generator.RandomGenerator.randint`.
+      :func:`~randomgen.generator.RandomGenerator.randint`.
 
 - Added :class:`~randomgen.mtrand.RandomState` as a clone of NumPy's
   RandomState.