Update ChangeLog for release.

ChangeLog

@@ -1,3 +1,19 @@
+version 3.2 (05-Nov-2019):
+ - This is the first release done again by @SirVer. And this is also posted
+ on vim.org again. `¯\_(ツ)_/¯`
+ - This is the last version to support Python 2.
+ - Syntax highlighting improvements: a new one for unite & tweaks to others.
+ - Support for transformations on multiple lines.
+ - Python interpolation got more powerful, for example tabstops can now be
+ modified in python interpolation, you can access the last changed
+ placeholder text and more.
+ - Support for deoplete.
+ - Snippet files are no longer watched for changes. This increases
+ performance, but also means that if you change your snippet files outside
+ of Vim, UltiSnips will not know about it. You need to run `:call
+ UltiSnips#RefreshSnippets()` or restart Vim.
+ - Text objects for selecting snippets in visual mode: iS, aS
+
 version 3.1 (07-Dec-2015):
  - This is the last release done by @SirVer. The new maintainer of UltiSnips
  is @seletskiy. The repository remains https://github.com/SirVer/ultisnips,