update the changelog and bump the version to v0.12.0

docs/changelog.rst

@@ -5,11 +5,21 @@ Changelog
 Development
 ===========
 - (Fill this out as you fix issues and develop your features).
-- Fixed using sets in field choices #1481
+
+Changes in 0.12.0
+=================
 - POTENTIAL BREAKING CHANGE: Fixed limit/skip/hint/batch_size chaining #1476
 - POTENTIAL BREAKING CHANGE: Changed a public `QuerySet.clone_into` method to a private `QuerySet._clone_into` #1476
 - Fixed connecting to a replica set with PyMongo 2.x #1436
+- Fixed using sets in field choices #1481
+- Fixed deleting items from a `ListField` #1318
 - Fixed an obscure error message when filtering by `field__in=non_iterable`. #1237
+- Fixed behavior of a `dec` update operator #1450
+- Added a `rename` update operator #1454
+- Added validation for the `db_field` parameter #1448
+- Fixed the error message displayed when querying an `EmbeddedDocumentField` by an invalid value #1440
+- Fixed the error message displayed when validating unicode URLs #1486
+- Raise an error when trying to save an abstract document #1449
 
 Changes in 0.11.0
 =================

docs/upgrade.rst

@@ -6,6 +6,9 @@ Development
 ***********
 (Fill this out whenever you introduce breaking changes to MongoEngine)
 
+
+0.12.0
+******
 This release includes various fixes for the `BaseQuerySet` methods and how they
 are chained together. Since version 0.10.1 applying limit/skip/hint/batch_size
 to an already-existing queryset wouldn't modify the underlying PyMongo cursor.

mongoengine/__init__.py

@@ -23,7 +23,7 @@ __all__ = (list(document.__all__) + list(fields.__all__) +
            list(signals.__all__) + list(errors.__all__))
 
 
-VERSION = (0, 11, 0)
+VERSION = (0, 12, 0)
 
 
 def get_version():