Fill in release date for 1.13.2

CHANGELOG.txt

@@ -188,8 +188,8 @@ Changelog
  * Fix: Prevent style leak of Wagtail panel icons in widgets using ``h2`` elements (THibaud Colas)
 
 
-1.13.2 (IN DEVELOPMENT)
-~~~~~~~~~~~~~~~~~~~~~~~
+1.13.2 (04.07.2018)
+~~~~~~~~~~~~~~~~~~~
 
  * Fix: Fix support of `ATOMIC_REBUILD` for projects with Elasticsearch client >=1.7.0 (Mikalai Radchuk)
  * Fix: Logging an indexing failure on an object with a non-ASCII representation no longer crashes on Python 2 (Aram Dulyan)

docs/releases/1.13.2.rst

@@ -1,6 +1,6 @@
-=============================================
-Wagtail 1.13.2 release notes - IN DEVELOPMENT
-=============================================
+============================
+Wagtail 1.13.2 release notes
+============================
 
 .. contents::
     :local: