Change version to 0.22.0dev

Change version to 0.21.0

Change version to 0.21.0dev

Move RNNT test to Torch specific tests (NVIDIA#1805)

Signed-off-by: Janusz Lisiecki <[email protected]>

Change version to 0.20.0dev

Change version to 0.19.0

Signed-off-by: Janusz Lisiecki <[email protected]>

Update the version to 0.19.0dev

Update the version to 0.18.0

Signed-off-by: Krzysztof Lecki <[email protected]>

Fix problem with TensorFlow and cupy tests (NVIDIA#1568)

- when tensorflow-gpu v1.15.0 is installed in the conda environment
  some strange dependency leads to `ModuleNotFoundError: No module
  named 'prompt_toolkit.formatted_text'` error
- according to jupyter/notebook#4050 installing
  `ipykernel<5.0.0 ipython<7.0.0` helps
- fixes cupy version to 6.6.0 as this the last one supporting python 2.7

Signed-off-by: Janusz Lisiecki <[email protected]>

Update the version to 0.18.0-dev

Signed-off-by: Krzysztof Lecki <[email protected]>