Suggestion: * `impl Driver for Box<Driver>` * Add `Driver::boxed(self) -> Box<Driver>` method to `Driver` Clean up [`TestBrowser::session()`](https://github.com/fluffysquirrels/webdriver_client_rust/blob/a031881bc903a5bb5b62d9660ac29e91398220e8/tests/webdriver_client_integration.rs#L31-L48) with this.
Suggestion:
impl Driver for Box<Driver>Driver::boxed(self) -> Box<Driver>method toDriverClean up
TestBrowser::session()with this.