Updated the CHANGELOG and version.

CHANGELOG

 django-ucamlookup changelog
 =============================
 
+3.0.0 - 23/04/2019
+------------------
+
+- Refactored library to use select2 version 4.0.6-rc.1 for it's user/group selection control. This
+is a **breaking change** as this version of select2 requires that the control's tag be a
+`<select>` instead of an `<input>`. The `group_list`/`user_list` parameters have been deprecated
+in favour of using the `<option>` tag (example in `README.md`). Also `validate_crsids()` has been
+deprecated in favour of `validate_crsid_list()` and `validate_groupid_list()` has been added.
+
 2.0.0 - 12/03/2019
 ------------------
 

setup.py

@@ -7,7 +7,7 @@ setup(
     long_description=open('README.md').read(),
     long_description_content_type='text/markdown',
     url='https://gitlab.developers.cam.ac.uk/uis/devops/django/ucamlookup',
-    version='2.0.0',
+    version='3.0.0',
     license='MIT',
     author='DevOps Division, University Information Services, University of Cambridge',
     author_email='devops@uis.cam.ac.uk',