work towards paring of shifts

rota/workers.py

@@ -1,7 +1,7 @@
 import datetime
 from collections import defaultdict
 from typing import Iterable, List, Literal, Optional
-from pydantic import BaseModel, Extra, validator
+from pydantic import BaseModel, ConfigDict, field_validator
 
 from rich.pretty import pprint
 from rota.console import console
@@ -37,7 +37,7 @@ class NonWorkingDays(BaseModel):
     start_date: datetime.date | None = None
     end_date: datetime.date | None = None
 
-    @validator("day")
+    @field_validator("day")
     def day_in(cls, day):
         for whole_day in whole_days:
             if day.lower() in whole_day:
@@ -83,8 +83,9 @@ class Worker(BaseModel):
     bank_holiday_extra: int = 0
     pair: int | str | None = None
 
-    class Config:
-        extra = Extra.allow
+    model_config = ConfigDict(
+        extra = "allow",
+    )
 
     #    def __init__(
     #        self,