fix: 🐛 description in setup.cfg

description not support attr
pypa/setuptools#3848

Author: ZhaoQi99

setup.cfg

@@ -22,7 +22,7 @@ classifiers =
     Programming Language :: Python :: Implementation :: CPython
     Environment :: Console
 license_files = LICENSE
-description = attr: pyencrypt.__description__
+description = Encrypt python source code and import module dynamically.
 long_description = file: README.md
 long_description_content_type = text/markdown
 keywords = python-encrypt, import-hook