Fix transform_bbox CRS types (#2265)

* Fix transform_bbox CRS types

* manually fix formatting

* manually fix formatting

Author: C-Loftus

pygeoapi/crs.py

@@ -278,15 +278,16 @@ def crs_transform_feature(feature: dict, transform_func: Callable):
         )
 
 
-def transform_bbox(bbox: list, from_crs: str, to_crs: str) -> list:
+def transform_bbox(bbox: list, from_crs: Union[str, pyproj.CRS],
+                   to_crs: Union[str, pyproj.CRS]) -> list:
     """
     helper function to transform a bounding box (bbox) from
     a source to a target CRS. CRSs in URI str format.
     Uses pyproj Transformer.
 
     :param bbox: list of coordinates in 'from_crs' projection
     :param from_crs: CRS to transform from
-    :param to_crs: CRSto transform to
+    :param to_crs: CRS to transform to
     :raises `CRSError`: Error raised if no CRS could be identified from an
         URI.