Fix installing entry points

Not sure why or when but the string syntax for entry points does not
seem to work correctly anymore (no scripts are installed).  Use
the explicit list-in-dict syntax instead.

CHANGELOG.md

@@ -12,6 +12,11 @@ project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 - Add `encoding` (`Optional[str]`) parameter to `get_key`, `set_key` and `unset_key`.
   (#379 by [@bbc2])
 
+### Fixed
+
+- Use dict to specify the `entry_points` parameter of `setuptools.setup` (#376 by
+  [@mgorny]).
+
 ## [0.19.2] - 2021-11-11
 
 ### Fixed
@@ -296,6 +301,7 @@ project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 [@gongqingkui]: https://github.com/gongqingkui
 [@greyli]: https://github.com/greyli
 [@jadutter]: https://github.com/jadutter
+[@mgorny]: https://github.com/mgorny
 [@qnighy]: https://github.com/qnighy
 [@snobu]: https://github.com/snobu
 [@techalchemy]: https://github.com/techalchemy

setup.py

@@ -36,10 +36,11 @@ def read_files(files):
     extras_require={
         'cli': ['click>=5.0', ],
     },
-    entry_points='''
-        [console_scripts]
-        dotenv=dotenv.cli:cli
-    ''',
+    entry_points={
+        "console_scripts": [
+            "dotenv=dotenv.cli:cli",
+        ],
+    },
     license='BSD-3-Clause',
     classifiers=[
         'Development Status :: 5 - Production/Stable',