Version 1.1.4.

Added some new methods, fixed some small bugs, improved unit testing, and tested against the latest backend versions.

This version was tested against: JAX 0.2.12 TensorFlow 2.4.1 PyTorch 1.8.1 MXNet 1.8.0 NumPy 1.20.2

However, Ivy 1.1.4 inevitably supports many previous and future backend versions, due to the stability of the core APIs for each backend framework.