github workflow: Update

Author: lschr

.github/workflows/testing.yml

@@ -5,7 +5,7 @@
 
 name: sdt-python test suite
 
-on:  [push, pull_request]
+on:  [push, pull_request, workflow_dispatch]
 
 jobs:
   build:
@@ -19,14 +19,20 @@ jobs:
     - uses: actions/checkout@v4
 
     - name: Install uv
-      uses: astral-sh/setup-uv@v5
+      uses: astral-sh/setup-uv@v7
       with:
         enable-cache: true
         cache-dependency-glob: "**/pyproject.toml"
+        python-version: "3.13"  # until numba supports something newer
+
+    - name: Install Linux libraries
+      shell: pwsh
+      if: ${{ matrix.os == "ubuntu" }}
+      run: apt install -y libegl-dev
 
     - name: Set up Python
       shell: pwsh
-      run: uv sync
+      run: uv sync --extra gui
 
     - name: Test with pytest
       shell: pwsh