1.3.* has already been released to Google Play, but it's a staged rollout, not every device has been updated yet.
The actual devices are chosen by Google Play's servers, I only set the percentage.
I intend to go to 100%, including every device, this weekend (there are issues being found, and I'm busy fixing them).
Or you can install a development version from this forum. It's same software, it will update your existing install keeping all data, and should subsequently get Google Play updates.