1.1.3 has been out for some time now.
However, it's only camera firmware.
There's another lens firmware that is still in 1.1.0..not sure why…
Also, the notes for 1.1.3 says:
1. Supports the single focal length EF40mm f/2.8 STM lens that is to be released at the end of June, 2012.
I don't even know what that means because even at 1.1.2, it does identify the lens correctly.
With 1.1.3, the description is still the same and there is still NO lens correction for that lens in 1.1.3…i presume that is in Lens firmware (which i've never seen before)
So in the end, i have no idea what 1.1.3 improves...