Resolve "weeks_within(start, end) misses last week if the start weekday is bigger then the end weekday"

Closes #9 (closed)

calendarweek/calendarweek.py

@@ -86,11 +86,14 @@ class CalendarWeek:
         if start > end:
             raise ValueError("End date must be after start date.")
 
-        current = start
+        start_week = cls.from_date(start)
+        end_week = cls.from_date(end)
+
+        current = start_week
         weeks = []
-        while current < end:
-            weeks.append(cls.from_date(current))
-            current += timedelta(days=7)
+        while current <= end_week:
+            weeks.append(current)
+            current += 1
 
         return weeks