Add data for 2020-2021

Author: AntoineAugusti

tests/test_init.py

@@ -63,9 +63,9 @@ def test_holidays_for_year(self):
             self.assertEquals(sorted(v.keys()), self.EXPECTED_KEYS)
 
         with self.assertRaisesRegexp(
-            UnsupportedYearException, "No data for year: 2021"
+            UnsupportedYearException, "No data for year: 2022"
         ):
-            self.assertEquals({}, d.holidays_for_year(2021))
+            self.assertEquals({}, d.holidays_for_year(2022))
 
     def test_holiday_for_year_by_name(self):
         d = SchoolHolidayDates()