Support Python 3.13, drop 3.8

Author: elacuesta

setup.py

@@ -22,18 +22,18 @@
         "Development Status :: 4 - Beta",
         "License :: OSI Approved :: BSD License",
         "Programming Language :: Python",
-        "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",
+        "Programming Language :: Python :: 3.13",
         "Framework :: Scrapy",
         "Intended Audience :: Developers",
         "Topic :: Internet :: WWW/HTTP",
         "Topic :: Software Development :: Libraries :: Application Frameworks",
         "Topic :: Software Development :: Libraries :: Python Modules",
     ],
-    python_requires=">=3.8",
+    python_requires=">=3.9",
     install_requires=[
         "scrapy>=2.0,!=2.4.0",
         "playwright>=1.15",