Fix type hints for Python 3.8

Signed-off-by: Thomas Lauf <[email protected]>

src/holidata/holiday.py

@@ -1,6 +1,6 @@
 import datetime
 from dataclasses import dataclass
-from typing import Iterator, Callable, Union
+from typing import Iterator, Callable, Union, Dict, List
 
 import dateutil
 
@@ -33,21 +33,21 @@ def as_dict(self) -> dict:
 
 class HolidayGenerator:
     def __init__(self, country_id: str, default_lang: str):
-        self.name_dict: dict[str, str] = {}
+        self.name_dict: Dict[str, str] = {}
         self.notes: str = ""
-        self.regions: list[str] = [""]
+        self.regions: List[str] = [""]
         self.flags: str = ""
         self.date: callable = None
         self.country_id: str = country_id
         self.default_lang: str = default_lang
-        self.filters: list[callable] = []
+        self.filters: List[callable] = []
 
     def with_name(self, name: str, lang: str = None) -> 'HolidayGenerator':
         lang = self.default_lang if lang is None else lang
         self.name_dict[lang] = name
         return self
 
-    def with_names(self, name_dict: dict[str, str]) -> 'HolidayGenerator':
+    def with_names(self, name_dict: Dict[str, str]) -> 'HolidayGenerator':
         self.name_dict = name_dict
         return self
 
@@ -65,7 +65,7 @@ def with_flags(self, flags: str) -> 'HolidayGenerator':
         self.flags = flags
         return self
 
-    def in_regions(self, regions: list[str]) -> 'HolidayGenerator':
+    def in_regions(self, regions: List[str]) -> 'HolidayGenerator':
         self.regions = regions
         return self
 
@@ -77,7 +77,7 @@ def annotated_with(self, note: str) -> 'HolidayGenerator':
         self.notes = note
         return self
 
-    def in_years(self, reference: list[int]) -> 'HolidayGenerator':
+    def in_years(self, reference: List[int]) -> 'HolidayGenerator':
         def reference_does_contain(year: int) -> bool:
             return year in reference
 
@@ -98,7 +98,7 @@ def reference_is_greater_or_equal_to(year: int) -> bool:
         self.filters.append(reference_is_greater_or_equal_to)
         return self
 
-    def except_for(self, reference: list[int]) -> 'HolidayGenerator':
+    def except_for(self, reference: List[int]) -> 'HolidayGenerator':
         def reference_does_not_contain(year: int) -> bool:
             return year not in reference
 
@@ -133,7 +133,7 @@ class Country(metaclass=PluginMount):
     Represents holidays of a given country
     """
     id: str
-    languages: list[str]
+    languages: List[str]
     default_lang: Union[str, None] = None
     easter_type: str
     holiday_generators: list
@@ -189,7 +189,7 @@ class Region:
     def __init__(self, id: str, country: Country):
         self.id: str = id
         self.country: Country = country
-        self.holiday_generators: list[HolidayGenerator] = []
+        self.holiday_generators: List[HolidayGenerator] = []
 
     def define_holiday(self) -> HolidayGenerator:
         generator = HolidayGenerator(self.country.id, self.country.default_lang)