Modify CI workflow to test Julia pre-release (#62)

* Modify CI workflow to test Julia pre-release

* Update incompressible elasticity tutorial with failed code

Author: KnutAM

.github/workflows/CI.yml

@@ -20,7 +20,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        version: ['1.11', '1']
+        version: ['1.11', '1', 'pre'] # 'lts' not supported as public is used
         os: ['ubuntu-latest']
         include:
           - os: windows-latest
@@ -70,3 +70,4 @@ jobs:
             DOCUMENTER_KEY: ${{ secrets.DOCUMENTER_KEY }}
             GKSwstype: '100'
           run: julia --project=docs --color=yes docs/make.jl
+

docs/src/literate_tutorials/incompressible_elasticity.jl

@@ -112,7 +112,7 @@ function solve(;ν, ipu, ipp)
     u = Symmetric(K) \ f;          # Solve the equation system
 
     ## Export the results
-    filename = "cook_" * (isa(ipu, Lagrange{2,RefTetrahedron,1}) ? "linear" : "quadratic") *
+    filename = "cook_" * (Ferrite.getorder(ipu) == 1 ? "linear" : "quadratic") *
                          "_linear"
     VTKGridFile(filename, dh) do vtk
         write_solution(vtk, dh, u)