IterableDataset breaks 1.1 compatibility
A recently introduced feature unfortunately breaks compability with Pytorch 1.1.0.
Describe the bug
IterableDataset support, introduced in issue 323, requires Pytorch 1.2.0+.
To Reproduce
In a python environment with Pytorch 1.1.0 do:
import pytorch_lightning
Expected behavior
Compatibility with Pytorch 1.1.0. I'm filing it as a bug report rather than a docs fix since the dependency on 1.2.0+ introduced by issue 323 doesn't seem to be intentional.