1.9 compatibility

[Niduroki]

Upstream has changed to using PDO escape, which we don't use, thus I have implemented a "dirty" addslashes escape within a custom class, which should work fine 🤞

Feel free to do some own testing.

Also I have updated get_results to fetchObjects. There does not seem to be any difference in functionality, just that get_results has been renamed.

[Niduroki]

Nevermind the dirty-escape.
Copying the actual escape (using PDO::quote()) from the parent YDB object works fine, too.

My PHP is a bit rusty, and the way yourls deals with custom db-drivers seems somewhat weird, thus there most certainly is a better way of dealing with this, but it works and seems understandable enough.