#24 restrict max sundials version

Author: kwabenantim

.github/workflows/test-vtk.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        vtk-version: ["8.2", "9.2"]
+        vtk-version: ["7.1", "8.2", "9.2"]
 
     steps:
       - name: checkout chaste
@@ -61,7 +61,7 @@ jobs:
             pip
             setuptools
             six
-            sundials
+            sundials<7.0
             tbb-devel
             vtk=${{ matrix.vtk-version }}
             wheel