fix string issue, update dep & python version

- For compatibility with Python 3.11 and older, use single quote inside
  f-string
- add dependency to numpy
- test against Python versions in Ubuntu 22.04, 24.04, and latest

.github/workflows/python-package.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.10", "3.11", "3.12"]
+        python-version: ["3.10", "3.12", "3.13"]
 
     steps:
     - uses: actions/checkout@v4

pyproject.toml

@@ -22,6 +22,7 @@ dependencies = [
   'rdflib>=7.1.0',
   'pyshacl',
   'platformdirs',
+  'numpy',
 ]
 
 [project.urls]

tests/test_distribution.py

@@ -25,7 +25,7 @@
 def get_matrix_string(matrix):
     row_strs = []
     for row in matrix:
-        row_strs.append(f"[{", ".join(map(str, row))}]")
+        row_strs.append(f"[{', '.join(map(str, row))}]")
     return f"[{", ".join(row_strs)}]"