Add python 3.12 version classifier since this was not auto detected by poetry/pypi, and add python 3.12 to test workflow

Author: MetinSa

.github/workflows/tests.yml

@@ -9,7 +9,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest]
-        python-versions: ['3.8', '3.9', '3.10', '3.11']
+        python-versions: ['3.8', '3.9', '3.10', '3.11', '3.12']
     steps:
       - uses: actions/checkout@v3
       - name: Set up Python ${{ matrix.python-version }}

pyproject.toml

@@ -7,11 +7,11 @@ authors = ["Metin San <metinisan@gmail.com>"]
 readme = "README.md"
 license = "GPL-3.0"
 exclude = ["test.py"]
-requires-python = ">=3.8"
 classifiers = [
     "Intended Audience :: Science/Research",
     "Operating System :: OS Independent",
     "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.12",
     "Topic :: Scientific/Engineering :: Astronomy",
     "Topic :: Scientific/Engineering :: Physics",
 ]