Switch to PEP 420 native namespace.

CHANGES.rst

@@ -2,9 +2,11 @@
  Changes
 =========
 
-7.1 (unreleased)
+8.0 (unreleased)
 ================
 
+- Replace ``pkg_resources`` namespace with PEP 420 native namespace.
+
 - Add preliminary support for Python 3.14 as of 3.14a4.
 
 - Drop support for Python 3.8.

setup.py

@@ -24,7 +24,6 @@
 import sys
 
 from setuptools import Extension
-from setuptools import find_packages
 from setuptools import setup
 
 
@@ -60,7 +59,7 @@
 
 
 tests_require = [
-    'zope.testrunner',
+    'zope.testrunner >= 6.4',
     'coverage',
 ]
 
@@ -102,7 +101,7 @@ def _unavailable(self, e):
 
 setup(
     name='zope.i18nmessageid',
-    version='7.1.dev0',
+    version='8.0.dev0',
     author='Zope Foundation and Contributors',
     author_email='[email protected]',
     description='Message Identifiers for internationalization',
@@ -133,9 +132,10 @@ def _unavailable(self, e):
     ],
     license='ZPL-2.1',
     url='https://github.com/zopefoundation/zope.i18nmessageid',
-    packages=find_packages('src'),
+    # we need the following two parameters because we compile C code,
+    # otherwise only the shared library is installed:
     package_dir={'': 'src'},
-    namespace_packages=['zope'],
+    packages=['zope.i18nmessageid'],
     install_requires=['setuptools'],
     python_requires='>=3.9',
     include_package_data=True,