update changelog

CHANGELOG.md

@@ -1,6 +1,12 @@
 # [v0.4.0](https://github.com/pybamm-team/PyBaMM/tree/v0.4.0) - 2021-03-27
 
-This release introduces several new models, including reversible and irreversible plating submodels, submodels for loss of active material, Yang et al.'s (2017) coupled SEI/plating/pore clogging model, and the Newman-Tobias model. There are also several internal optimizations for solving models, particularly for simulating experiments, with more accurate event detection and more efficient numerical methods and post-processing. Models can now be solved with different inputs in parallel. Plotting functionality has been improved, including adding a new 'voltage component' plot. Several other new features, optimizations, and bug fixes are summarized below.
+This release introduces:
+- several new models, including reversible and irreversible plating submodels, submodels for loss of active material, Yang et al.'s (2017) coupled SEI/plating/pore clogging model, and the Newman-Tobias model
+- internal optimizations for solving models, particularly for simulating experiments, with more accurate event detection and more efficient numerical methods and post-processing
+- parallel solutions of a model with different inputs
+- a cleaner installation process for Mac, no longer requiring a Homebrew installation of Sundials
+- improved plotting functionality, including adding a new 'voltage component' plot
+- several other new features, optimizations, and bug fixes, summarized below
 
 ## Features
 -   Added `NewmanTobias` li-ion battery model ([#1423](https://github.com/pybamm-team/PyBaMM/pull/1423))