fix: py310 support without StrEnum

Author: Olegt0rr

yatracker/types/issue_link.py

@@ -3,19 +3,19 @@
 __all__ = ["IssueLink", "LinkType", "LinkDirection"]
 
 from datetime import datetime
-from enum import StrEnum, auto
+from enum import Enum
 
 from .base import Base, field
 from .issue import Issue
 from .status import Status
 from .user import User
 
 
-class LinkDirection(StrEnum):
+class LinkDirection(str, Enum):
     """Represents link direction."""
 
-    INWARD = auto()
-    OUTWARD = auto()
+    INWARD = "inward"
+    OUTWARD = "outward"
 
 
 class LinkType(Base, kw_only=True):