Add import to __init__.py

src/pycruisemapper/__init__.py

@@ -0,0 +1 @@
+from .classes import CruiseMapper

src/pycruisemapper/classes/__init__.py

@@ -1 +1,7 @@
 from .api import CruiseMapper
+from .cruise import Cruise
+from .flag import Flag
+from .http import HTTPRequest
+from .location import Location
+from .ship import Ship
+from .shipline import ShipLine

src/pycruisemapper/classes/cruise.py

@@ -1,4 +1,6 @@
-from typing import Optional
+from typing import Optional, List, Tuple
+
+from datetime import datetime
 
 
 class Cruise: