Update tests, function moved.

tests/test_agenda.py

@@ -5,7 +5,6 @@ from decimal import Decimal
 
 import pytest
 from agenda import (
-    get_gbpusd,
     get_next_bank_holiday,
     get_next_timezone_transition,
     next_economist,
@@ -14,6 +13,7 @@ from agenda import (
     timedelta_display,
     uk_financial_year_end,
 )
+from agenda.fx import get_gbpusd
 
 
 @pytest.fixture