use explicit_package_bases to avoid duplicate-file problems in examples

Author: minrk

.pre-commit-config.yaml

@@ -30,7 +30,6 @@ repos:
     rev: v0.942
     hooks:
       - id: mypy
-        exclude: examples/simple/setup.py
         additional_dependencies: [types-requests]
 
   - repo: https://github.com/pre-commit/mirrors-prettier

pyproject.toml

@@ -141,9 +141,8 @@ strict_equality = true
 warn_unused_configs = true
 warn_unused_ignores = true
 warn_redundant_casts = true
-exclude = [
-    "examples/simple/setup.py",
-]
+explicit_package_bases = true
+namespace_packages = true
 
 
 [[tool.mypy.overrides]]