Modify Python support

Drop Python 3.8 and 3.9 support
Add Python 3.12 support

.github/workflows/python.yml

@@ -6,7 +6,7 @@ jobs:
   tox:
     strategy:
       matrix:
-        python-version: ['3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.10', '3.11', '3.12']
         os: [ubuntu-22.04, macos-12]
     runs-on: ${{ matrix.os }}
     steps:

setup.py

@@ -74,8 +74,6 @@ def finalize_options(self):
         'Programming Language :: Python',
         'Programming Language :: Python :: 3',
         'Programming Language :: Python :: 3 :: Only',
-        'Programming Language :: Python :: 3.8',
-        'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
         'Programming Language :: Python :: 3.11',
     ],

tox.ini

@@ -1,9 +1,8 @@
 [gh-actions]
 python =
-    3.8: py38, numpy, coverage, pep8
-    3.9: py39
-    3.10: py310
+    3.10: py310, numpy, coverage, pep8
     3.11: py311
+    3.12: py312
 
 [tox]
 requires =
@@ -13,10 +12,9 @@ requires =
 
 # Environment changes have to be manually synced with `.github/workflows/python.yml`.
 envlist =
-    py38
-    py39
     py310
     py311
+    py312
     numpy
     coverage
     pep8
@@ -37,7 +35,7 @@ commands =
         -m pytest tests --cov "{envsitepackagesdir}/tensora"
 
 [testenv:numpy]
-basepython = python3.8
+basepython = python3.10
 setenv =
     COVERAGE_FILE = .coverage.numpy
 extras =
@@ -49,7 +47,7 @@ commands =
 [testenv:coverage]
 # Separate step for combining coverage
 skip_install = true
-depends = py38
+depends = py310
 setenv =
 deps =
     coverage >= 4.5.3