updated changelog

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Added `stepsampler_ultranest` to use Ultranest's stepsampler (see https://johannesbuchner.github.io/UltraNest/example-sine-highd.html).
 - `setup.py` automatically installs `ultranest` and `emcee` now, as both are supported by `juliet`.
 - Added canonical `_version.py` file to store versions of the code, following user Zooko in stackoverflow question 458550. Modified `__init__.py` and `setup.py` accordingly.
+- Added `test_juliet.py` script to give `juliet` a test run with all the samplers.
 
 ### Fixed
 - `juliet.fit` docstring parsing.