deps: Fix dependency versions

.github/workflows/pytest_core.yml

@@ -23,9 +23,9 @@ jobs:
         os: [ubuntu-latest, macos-latest]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
     - name: Set up Python ${{matrix.python-version}}
-      uses: actions/setup-python@v1
+      uses: actions/setup-python@v5
       with:
         python-version: ${{matrix.python-version}}
     - name: Install dependencies

README.md

@@ -1,3 +1,8 @@
+## NOTE: Support for OSS Schism has ended
+Dependencies have been fixed at the last confirmed working versions. Feel free to fork this repository to develop your own work.
+
+A continuation of the Schism project is maintained by Devito Codes Ltd, please get in touch if you are interested.
+
 ## Schism
 
 [![CI-Core](https://github.com/EdCaunt/schism/actions/workflows/pytest_core.yml/badge.svg)](https://github.com/EdCaunt/schism/actions/workflows/pytest_core.yml)

requirements.txt

@@ -1,4 +1,5 @@
-devito[tests] @ git+https://github.com/devitocodes/devito@master
-matplotlib
-networkx
-pyvista
+devito==4.8.5
+pytest==8.1.1
+scipy==1.10.1
+networkx==3.1
+sympy==1.12