Adapt noxfile and CI

 - Pull pystencils before every testsuite run
 - Permit all Python versions since 3.10
 - Add python 3.13 testsuite run to CI

.gitlab-ci.yml

@@ -23,12 +23,10 @@ typechecker:
   script:
     - nox --session typecheck
 
-testsuite:
+.testsuite-base:
   extends: .nox-base
   stage: "Tests"
   needs: []
-  script:
-    - nox --session testsuite
   coverage: '/TOTAL.*\s+(\d+%)$/'
   artifacts:
     when: always
@@ -40,6 +38,16 @@ testsuite:
         coverage_format: cobertura
         path: coverage.xml
 
+"testsuite-py3.10":
+  extends: .testsuite-base
+  script:
+    - nox --session testsuite-3.10
+
+"testsuite-py3.13":
+  extends: .testsuite-base
+  script:
+    - nox --session testsuite-3.13
+
 build-documentation:
   extends: .nox-base
   stage: "Documentation"

noxfile.py

@@ -11,7 +11,14 @@ def add_pystencils_git(session: nox.Session):
     cache_dir = session.cache_dir
 
     pystencils_dir = cache_dir / "pystencils"
-    if not pystencils_dir.exists():
+    if pystencils_dir.exists():
+        with session.chdir(pystencils_dir):
+            session.run_install(
+                "git",
+                "pull",
+                external=True
+            )
+    else:
         session.run_install(
             "git",
             "clone",
@@ -50,7 +57,7 @@ def typecheck(session: nox.Session):
     session.run("mypy", "src/pystencilssfg")
 
 
-@nox.session(python=["3.10"], tags=["tests"])
+@nox.session(python=["3.10", "3.11", "3.12", "3.13"], tags=["tests"])
 def testsuite(session: nox.Session):
     """Run the testsuite and measure coverage."""
     editable_install(session, ["testsuite"])