add single transaction based sql driver project

README.md

@@ -625,6 +625,7 @@ See [go-hardware](https://github.com/rakyll/go-hardware) for a comprehensive lis
 * Mock
     * [counterfeiter](https://github.com/maxbrunsfeld/counterfeiter) - Tool for generating self-contained mock objects
     * [go-sqlmock](https://github.com/DATA-DOG/go-sqlmock) - Mock SQL driver for testing database interactions
+    * [go-txdb](https://github.com/DATA-DOG/go-txdb) - Single transaction based database driver mainly for testing purposes.
     * [gomock](https://github.com/golang/mock) - Mocking framework for the Go programming language.
     * [mockhttp](https://github.com/tv42/mockhttp) - Mock object for Go http.ResponseWriter