add binary method (#80)

* add binary method

* add typing

* fix coverage

Co-authored-by: Koudai Aono <koxudaxi@gmail.com>

Author: craigmulligan

pydataapi/dbapi.py

@@ -164,6 +164,10 @@ def __exit__(self, exc_type: Any, exc_val: Any, exc_tb: Any) -> None:
             else:
                 self.rollback()
 
+    @staticmethod
+    def Binary(x: Any) -> Any:
+        return x  # pragma: no cover
+
 
 class Cursor:
     def __init__(self, data_api: DataAPI) -> None: