Re-add classifiers to pyproject.

Author: Fuyukai

pyproject.toml

@@ -16,6 +16,22 @@ dependencies = [
     "typing_extensions; python_version < '3.12'"
 ]
 dynamic = ["version"]
+classifiers = [
+    "Development Status :: 4 - Beta",
+    "Intended Audience :: Developers",
+    "License :: OSI Approved :: MIT License",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3 :: Only",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
+    "Topic :: Internet :: WWW/HTTP",
+    "Topic :: System :: Networking",
+]
 
 [project.urls]
 source = "https://github.com/python-hyper/h11"