fix: 🐛 exclude tests dir in setup.cfg

Author: ZhaoQi99

setup.cfg

@@ -39,7 +39,7 @@ install_requires =
     setuptools >= 66.1.0; python_version >= '3.12'
     setuptools <= 60.9.0; python_version < '3.12'
 python_requires = >=3.6,<3.14
-packages = find:
+packages = pyencrypt
 # package_dir =
 #     = src