Fix CI failures: Add Windows support and remove Python 3.7

- Add platform-specific compiler flags in setup.py (MSVC for Windows, GCC/Clang for Unix)
- Remove Python 3.7 from test matrix (EOL, not available on latest runners)
- Update python_requires to >=3.8
- Fixes MSVC error: "invalid numeric argument '/Wextra'"

Co-authored-by: wannaphong <8536487+wannaphong@users.noreply.github.com>

Author: Copilot

.github/workflows/test.yml

@@ -64,7 +64,7 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest, macos-latest, windows-latest]
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
+        python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
 
     steps:
     - name: Checkout code

setup.py

@@ -2,11 +2,20 @@
 
 from setuptools import setup, Extension
 import os
+import sys
 
 # Read README for long description
 with open("README.md", "r", encoding="utf-8") as fh:
     long_description = fh.read()
 
+# Platform-specific compiler flags
+if sys.platform == "win32":
+    # MSVC compiler flags
+    extra_compile_args = ["/W3", "/O2"]
+else:
+    # GCC/Clang compiler flags
+    extra_compile_args = ["-Wall", "-Wextra", "-O2"]
+
 # Define the C extension module
 cthainlp_extension = Extension(
     name="_cthainlp",
@@ -17,7 +26,7 @@
         "python/cthainlp_wrapper.c",
     ],
     include_dirs=["include"],
-    extra_compile_args=["-Wall", "-Wextra", "-O2"],
+    extra_compile_args=extra_compile_args,
 )
 
 setup(
@@ -36,14 +45,13 @@
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
         "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 :: C",
         "Topic :: Text Processing :: Linguistic",
     ],
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     include_package_data=True,
 )