Why this change?
This is what `Capybara::Session#quit` does:
```
def quit
@driver.quit if @driver.respond_to? :quit
@document = @driver = nil
@touched = false
@server&.reset_error!
end
```
One notable thing is that it resets server errors which means that any
server errors encountered by a session is cleared. That is not what we
want since it hides errors even though `Capybara.raise_server_errors`
has been set to `true`.
68a3f7783e