Change naming for incl_btw to incl_vat (#219)

README.md

@@ -76,7 +76,7 @@ from energyzero import EnergyZero
 
 async def main() -> None:
     """Show example on fetching the energy prices from EnergyZero."""
-    async with EnergyZero(incl_btw="true") as client:
+    async with EnergyZero(incl_vat=True) as client:
         start_date = date(2022, 12, 7)
         end_date = date(2022, 12, 7)
 
@@ -92,7 +92,7 @@ if __name__ == "__main__":
 
 | Parameter | value Type | Description |
 | :-------- | :--------- | :---------- |
-| `incl_btw` | str (default: **true**) | Include or exclude BTW |
+| `incl_vat` | bool (default: **True**) | Include or exclude VAT |
 
 ### Function Parameters
 

src/energyzero/energyzero.py

@@ -28,7 +28,7 @@
 class EnergyZero:
     """Main class for handling data fetching from EnergyZero."""
 
-    incl_btw: str = "true"
+    incl_vat: bool = True
     request_timeout: float = 10.0
     session: ClientSession | None = None
 
@@ -180,7 +180,7 @@ async def gas_prices(
                 "tillDate": utc_end_date.strftime("%Y-%m-%dT%H:%M:%S.999Z"),
                 "interval": interval,
                 "usageType": 3,
-                "inclBtw": self.incl_btw.lower(),
+                "inclBtw": "true" if self.incl_vat else "false",
             },
         )
 
@@ -238,7 +238,7 @@ async def energy_prices(
                 "tillDate": utc_end_date.strftime("%Y-%m-%dT%H:%M:%S.999Z"),
                 "interval": interval,
                 "usageType": 1,
-                "inclBtw": self.incl_btw.lower(),
+                "inclBtw": "true" if self.incl_vat else "false",
             },
         )