Turkish Lira symbol changed, use the new one

Thanks for reporting this change! It will have to be fixed in 8.x-3.x first. For 7.x-2.x, it will then have to be fixed in https://github.com/bartfeenstra/currency/tree/1.x.

Let's also make sure we add the old symbol to the currency's alternative signs.

The test failures might simply be caused by recent changes in Drupal core. I triggered another branch test that should confirm this.

Meanwhile, can you add the old sign to the lira's alternative signs, for those who still want to use it?

See https://www.drupal.org/patch/reroll for instructions on how to re-roll a patch.

Currency 8.x-3.x now uses https://github.com/Commercie/currency and no longer contains its own currency information, which means this issue must be fixed first in https://github.com/Commercie/currency and then in https://github.com/bartfeenstra/currency.