Remove support for EOL'ed versions of Python (dpkp#160)

* Remove support for EOL'ed versions of Python

* Update setup.py

Author: wbarnha

setup.py

@@ -32,6 +32,7 @@ def run(cls):
 
 setup(
     name="kafka-python-ng",
+    python_requires=">=3.8",
     use_scm_version=True,
     setup_requires=["setuptools_scm"],
     tests_require=test_require,
@@ -60,13 +61,6 @@ def run(cls):
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python",
-        "Programming Language :: Python :: 2",
-        "Programming Language :: Python :: 2.7",
-        "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.4",
-        "Programming Language :: Python :: 3.5",
-        "Programming Language :: Python :: 3.6",
-        "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",