Add "New deprecations" subheading to What's New template (#414)

Author: hugovk

run_release.py

@@ -136,12 +136,20 @@
 Deprecated
 ==========
 
+New deprecations
+----------------
+
 * module_name:
   TODO
 
 .. Add deprecations above alphabetically, not here at the end.
 
 
+.. TODO .. include:: ../deprecations/pending-removal-in-3.xx.rst
+
+.. include:: ../deprecations/pending-removal-in-future.rst
+
+
 Porting to Python {version}
 ======================