update changelog and revert fix

.github/workflows/build_wheels_and_publish.yml

@@ -37,10 +37,6 @@ jobs:
     - name: Install build-time deps for MacOS
       if: matrix.os == 'macos-latest'
       run: |
-        # Temporary fix for https://github.com/actions/virtual-environments/issues/1811
-        brew untap local/homebrew-openssl
-        brew untap local/homebrew-python2
-        # End of fix
         brew update
         brew install graphviz
         brew install sundials

.github/workflows/test_on_push.yml

@@ -50,10 +50,6 @@ jobs:
     - name: Install MacOS system dependencies
       if: matrix.os == 'macos-latest'
       run: |
-        # Temporary fix for https://github.com/actions/virtual-environments/issues/1811
-        brew untap local/homebrew-openssl
-        brew untap local/homebrew-python2
-        # End of fix
         brew update
         brew install graphviz
         brew install openblas

CHANGELOG.md

@@ -1,7 +1,10 @@
-# [Unreleased](https://github.com/pybamm-team/PyBaMM)
+# [v0.3.0](https://github.com/pybamm-team/PyBaMM)
+
+This release introduces a new aging model for particle swelling and cracking, a new reduced-order model (TSPMe), and a parameter set for A123 LFP cells. Additionally, there have been several backend optimizations to speed up model creation and solving, and other minor features and bug fixes.
 
 ## Features
 
+-   Added a submodel for particle swelling and cracking ([#1232](https://github.com/pybamm-team/PyBaMM/pull/1232))
 -   Added a notebook on how to speed up the solver and handle instabilities ([#1223](https://github.com/pybamm-team/PyBaMM/pull/1223))
 -   Improve string printing of `BinaryOperator`, `Function`, and `Concatenation` objects ([#1223](https://github.com/pybamm-team/PyBaMM/pull/1223))
 -   Added `Solution.integration_time`, which is the time taken just by the integration subroutine, without extra setups ([#1223](https://github.com/pybamm-team/PyBaMM/pull/1223))