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/shop.py

@@ -1,40 +1,39 @@
 from dataclasses import dataclass
 from typing import Tuple, Optional
 
-from .game_item import ItemSource, kw_only, Requirement
+from .game_item import ItemSource
 from ..strings.season_names import Season
 
 ItemPrice = Tuple[int, str]
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class ShopSource(ItemSource):
     shop_region: str
     money_price: Optional[int] = None
     items_price: Optional[Tuple[ItemPrice, ...]] = None
     seasons: Tuple[str, ...] = Season.all
-    other_requirements: Tuple[Requirement, ...] = ()
 
     def __post_init__(self):
         assert self.money_price is not None or self.items_price is not None, "At least money price or items price need to be defined."
         assert self.items_price is None or all(isinstance(p, tuple) for p in self.items_price), "Items price should be a tuple."
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class MysteryBoxSource(ItemSource):
     amount: int
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class ArtifactTroveSource(ItemSource):
     amount: int
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class PrizeMachineSource(ItemSource):
     amount: int
 
 
-@dataclass(frozen=True, **kw_only)
+@dataclass(frozen=True, kw_only=True)
 class FishingTreasureChestSource(ItemSource):
     amount: int