Add release notes for 1.1.2

Author: jleclanche

CHANGELOG.md

@@ -4,6 +4,13 @@
 * **Compatibility**: Django 2.0 is the new minimum required version.
 * **New feature**: Added TokenMatchesOASRequirements Permissions.
 
+
+### 1.1.2 [2018-05-12]
+
+* Return state with Authorization Denied error (RFC6749 section 4.1.2.1)
+* Fix a crash with malformed base64 authentication headers
+* Fix a crash with malformed IPv6 redirect URIs
+
 ### 1.1.1 [2018-05-08]
 
 * **Critical**: Django OAuth Toolkit 1.1.0 contained a migration that would revoke all existing
@@ -26,7 +33,6 @@
   refresh tokens may be re-used.
 * An `app_authorized` signal is fired when a token is generated.
 
-
 ### 1.0.0 [2017-06-07]
 
 * **New feature**: AccessToken, RefreshToken and Grant models are now swappable.