Fix indentation (#82)

Author: suremarc

polygon/rest/client.py

@@ -38,7 +38,7 @@ def reference_tickers(self, **query_params) -> models.ReferenceTickersApiRespons
         endpoint = f"{self.url}/v2/reference/tickers"
         return self._handle_response("ReferenceTickersApiResponse", endpoint, query_params)
 
-   def reference_tickers_v3(self, next_url=None, **query_params) -> models.ReferenceTickersV3ApiResponse:
+    def reference_tickers_v3(self, next_url=None, **query_params) -> models.ReferenceTickersV3ApiResponse:
         endpoint = f"{self.url}/v3/reference/tickers" if not next_url else next_url
         return self._handle_response("ReferenceTickersV3ApiResponse", endpoint, query_params)