refactor: update __all__ with hello in __init__.py

Author: remarkablemark

README.md

@@ -23,9 +23,9 @@ pip install python_package_template
 Print greeting:
 
 ```py
-from python_package_template import template
+from python_package_template import hello
 
-print(template.hello())
+print(hello())
 ```
 
 ## License

src/python_package_template/__init__.py

@@ -1,3 +1,7 @@
 """Python Package Template"""
 
+from .template import hello
+
+__all__ = ["hello"]
+
 __version__ = "0.0.0"

tests/python_package_template/test_template.py

@@ -1,4 +1,4 @@
-from python_package_template.template import hello
+from python_package_template import hello
 
 
 def test_hello():