Change python requirements.

Author: revalo

setup.cfg

@@ -29,5 +29,5 @@ classifiers =
 [options]
 packages = find:
 include_package_data = true
-python_requires = >= 3.6
+python_requires = >= 3.10
 # Dependencies are in setup.py for GitHub's dependency graph.

setup.py

@@ -1,6 +1,6 @@
 import re
 
-from setuptools import setup, find_packages
+from setuptools import setup
 
 with open("iceberg/__init__.py", encoding="utf8") as f:
     version = re.search(r'__version__ = "(.*?)"', f.read()).group(1)