Lift Python version upper limit

Re spine-tools/Spine-Toolbox#2522

.github/workflows/run_unit_tests.yml

@@ -13,7 +13,7 @@ jobs:
     strategy:
       matrix:
         os: [windows-latest, ubuntu-22.04]
-        python-version: [3.8, 3.9, "3.10", 3.11]
+        python-version: [3.8, 3.9, "3.10", 3.11, 3.12]
     steps:
     - uses: actions/checkout@v4
       with:

pyproject.toml

@@ -7,11 +7,11 @@ description = "A package to run Spine workflows."
 keywords = ["energy system modelling", "workflow", "optimisation", "database"]
 readme = {file = "README.md", content-type = "text/markdown"}
 classifiers = [
-	    "Programming Language :: Python :: 3",
-	    "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
-	    "Operating System :: OS Independent",
+    "Programming Language :: Python :: 3",
+    "License :: OSI Approved :: GNU Lesser General Public License v3 (LGPLv3)",
+    "Operating System :: OS Independent",
 ]
-requires-python = ">=3.8.1, <3.12"
+requires-python = ">=3.8.1"
 dependencies = [
     # dagster >= 0.12.9 requires alembic that is incompatible with spinedb_api
     "dagster>=0.12.6, <0.12.9",
@@ -51,10 +51,10 @@ spine_engine = ["execution_managers/spine_repl.jl"]
 
 [tool.setuptools.packages.find]
 exclude = [
-	"bin*",
-	"docs*",
-	"fig*",
-	"tests*",
+    "bin*",
+    "docs*",
+    "fig*",
+    "tests*",
 ]
 
 [tool.coverage.run]