The "driver_path" paramater is not working in the embulk-output-sqlserver plugin

Thank you for developing this great plugin.
The issue in the input plugin seems to be occuring in the output plugin as well.
https://github.com/embulk/embulk-input-jdbc/issues/266

Start by reading the linked embulk-input-jdbc issue #266 and then inspect how the embulk-output-jdbc plugin handles the driver_path parameter for SQL Server. Done means driver_path works in the output plugin as it does in the corresponding input-plugin case; the issue names no file or test to run.

Written by the indexing model from the issue text.