chore: update metadata

pyproject.toml

@@ -2,5 +2,5 @@
 requires = [
     "setuptools",
     "wheel",
-    "oldest-supported-numpy",
+    "numpy",
 ]

setup.py

@@ -17,7 +17,7 @@ def requirements():
   version="0.1.2",
   setup_requires=['numpy'],
   install_requires=['numpy', 'zfpy'],
-  python_requires=">=3.7,<4.0", # >= 3.7 < 4.0
+  python_requires=">=3.8,<4.0",
   author="William Silversmith",
   author_email="[email protected]",
   packages=setuptools.find_packages(),
@@ -38,10 +38,11 @@ def requirements():
     "License :: OSI Approved :: GNU Lesser General Public License v3 or later (LGPLv3+)",
     "Programming Language :: Python",
     "Programming Language :: Python :: 3",
-    "Programming Language :: Python :: 3.7",
     "Programming Language :: Python :: 3.8",
     "Programming Language :: Python :: 3.9",
     "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
     "Topic :: Scientific/Engineering",
     "Intended Audience :: Science/Research",
     "Operating System :: POSIX",