DOC: start 1.0.4 (#33970)

Author: simonjayhawkins

doc/source/whatsnew/index.rst

@@ -16,6 +16,7 @@ Version 1.0
 .. toctree::
    :maxdepth: 2
 
+   v1.0.4
    v1.0.3
    v1.0.2
    v1.0.1

doc/source/whatsnew/v1.0.3.rst

@@ -26,4 +26,4 @@ Bug fixes
 Contributors
 ~~~~~~~~~~~~
 
-.. contributors:: v1.0.2..v1.0.3|HEAD
+.. contributors:: v1.0.2..v1.0.3

doc/source/whatsnew/v1.0.4.rst

@@ -0,0 +1,31 @@
+
+.. _whatsnew_104:
+
+What's new in 1.0.4 (May ??, 2020)
+------------------------------------
+
+These are the changes in pandas 1.0.4. See :ref:`release` for a full changelog
+including other versions of pandas.
+
+{{ header }}
+
+.. ---------------------------------------------------------------------------
+
+.. _whatsnew_104.regressions:
+
+Fixed regressions
+~~~~~~~~~~~~~~~~~
+- 
+- 
+
+.. _whatsnew_104.bug_fixes:
+
+Bug fixes
+~~~~~~~~~
+- 
+- 
+
+Contributors
+~~~~~~~~~~~~
+
+.. contributors:: v1.0.3..v1.0.4|HEAD