Core: purge py3.8 and py3.9 (#3973)

Co-authored-by: Remy Jette <remy@remyjette.com>
Co-authored-by: Jouramie <16137441+Jouramie@users.noreply.github.com>
Co-authored-by: Aaron Wagener <mmmcheese158@gmail.com>

worlds/stardew_valley/data/harvest.py

@@ -1,18 +1,17 @@
 from dataclasses import dataclass
 from typing import Tuple, Sequence, Mapping
 
-from .game_item import ItemSource, kw_only, ItemTag, Requirement
+from .game_item import ItemSource, ItemTag
 from ..strings.season_names import Season
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class ForagingSource(ItemSource):
     regions: Tuple[str, ...]
     seasons: Tuple[str, ...] = Season.all
-    other_requirements: Tuple[Requirement, ...] = ()
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class SeasonalForagingSource(ItemSource):
     season: str
     days: Sequence[int]
@@ -22,17 +21,17 @@ class SeasonalForagingSource(ItemSource):
         return ForagingSource(seasons=(self.season,), regions=self.regions)
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class FruitBatsSource(ItemSource):
     ...
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class MushroomCaveSource(ItemSource):
     ...
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class HarvestFruitTreeSource(ItemSource):
     add_tags = (ItemTag.CROPSANITY,)
 
@@ -46,7 +45,7 @@ class HarvestFruitTreeSource(ItemSource):
         }
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class HarvestCropSource(ItemSource):
     add_tags = (ItemTag.CROPSANITY,)
 
@@ -61,6 +60,6 @@ class HarvestCropSource(ItemSource):
         }
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class ArtifactSpotSource(ItemSource):
     amount: int