fix: update Ruff configuration to ignore E501 and enforce Python 3.8 or higher in setup

Author: wozozo

pyproject.toml

@@ -17,7 +17,7 @@ select = [
     "I",   # isort
     "W",   # pycodestyle 警告
 ]
-ignore = []
+ignore = ["E501"]
 
 # isort の設定
 [tool.ruff.lint.isort]

setup.py

@@ -1,7 +1,13 @@
+import sys
+
 from setuptools import setup
 
 install_requires = []
 
+if sys.version_info < (3, 8):
+    raise DeprecationWarning(
+        "Python versions below 3.8 are no longer supported by PAY.JP. Please use Python 3.8 or higher."
+    )
 
 install_requires.append("requests >= 2.7.0")