Move the module to a package and add py.typed file.

Author: rafalkrupinski

mimeparse.py renamed to mimeparse/__init__.py

@@ -51,7 +51,7 @@ Chat = "https://gitter.im/falconry/user"
 
 [tool.setuptools]
 license-files = ["LICENSE"]
-py-modules = ["mimeparse"]
+packages = ["mimeparse"]
 
 [tool.setuptools.dynamic]
 version = {attr = "mimeparse.__version__"}