Adding type-checking to is_all_time_in_interval

Author: erikvansebille

src/parcels/_core/utils/time.py

@@ -56,7 +56,7 @@ def time_length_as_flt(self):
     def __contains__(self, item: T) -> bool:
         return self.left <= item <= self.right
 
-    def is_all_time_in_interval(self, time):
+    def is_all_time_in_interval(self, time: float):
         item = np.atleast_1d(time)
         return (0 <= item).all() and (item <= self.time_length_as_flt).all()