Merge pull request #28 from kmike/none

Update typing allowing get_port to select any available port randomly

src/port_for/api.py

@@ -127,6 +127,7 @@ def filter_by_type(lst: Iterable, type_of: Type[T]) -> List[T]:
 
 def get_port(
     ports: Union[
+        None,
         str,
         int,
         Tuple[int, int],

tests/test_cases.py

@@ -51,6 +51,11 @@ def test_binding_high() -> None:
     assert not port_for.port_is_used(port)
 
 
+def test_get_port_random() -> None:
+    """Test case allowing get port to randomly select any port."""
+    assert get_port(None)
+
+
 def test_get_port_none() -> None:
     """Test special case for get_port to return None."""
     assert not get_port(-1)