dialect_snowflake_test.go uses an unsupported type

In https://github.com/go-gorp/gorp/blob/main/dialect_snowflake_test.go, there is a test case for checking the SQL type of `[]uint8{1}`, except `bytea` is not a supported type by Snowflake: https://docs.snowflake.com/en/sql-reference/intro-summary-data-types.

If updated to `binary` instead of `bytea`, this test will pass.