Drop python3.7 support, require python 3.8+

setuptools_scm 7.x has a bug in determining versions correctly, so we
want to use v8.0+, which does not support python3.7. Since python3.7
has hit EOL, we require python3.8 as the minimum supported version.

LICENSE

@@ -1,6 +1,6 @@
 The MIT License
 
-Copyright (c) 2019-2020 Jongwook Choi
+Copyright (c) 2019-2023 Jongwook Choi
 
 Permission is hereby granted, free of charge, to any person
 obtaining a copy of this software and associated documentation

README.md

@@ -34,4 +34,4 @@ pip install git+https://github.com/wookayin/expt@master        # Latest developm
 License
 -------
 
-MIT License (c) 2019-2022 Jongwook Choi
+MIT License (c) 2019-2023 Jongwook Choi

expt/__init__.py

@@ -5,8 +5,8 @@
 
 import sys
 
-if sys.version_info < (3, 7):
-  raise RuntimeError("This library requires python 3.7+.")
+if sys.version_info < (3, 8):
+  raise RuntimeError("This library requires python 3.8+.")
 
 try:
   from ._version import version as __version__

pyproject.toml

@@ -1,9 +1,9 @@
 [build-system]
 requires = [
     "setuptools >= 64.0",
-    "setuptools_scm[toml]==7.1.0", # Python 3.7 support
+    "setuptools_scm[toml]>=8.0",
     "wheel",
-    "setuptools-rust==1.7.0",      # Python 3.7 support
+    "setuptools-rust",
 ]
 
 [tool.setuptools_scm]

setup.py

@@ -169,14 +169,14 @@ def next_semver(version: setuptools_scm.version.ScmVersion):
         'Development Status :: 3 - Alpha',
         'License :: OSI Approved :: MIT License',
         'Operating System :: POSIX :: Linux',
-        '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',
         'Topic :: Utilities',
         'Topic :: Scientific/Engineering',
     ],
+    python_requires='>=3.8',
     packages=['expt'],
     rust_extensions=[
         RustExtension("expt._internal", binding=Binding.PyO3, \
@@ -196,5 +196,4 @@ def next_semver(version: setuptools_scm.version.ScmVersion):
     },  # type: ignore
     include_package_data=True,
     zip_safe=False,
-    python_requires='>=3.7',
 )