Spotify-tensorflow

- Depends on Tensorflow 1.15.0
- Depends on Tensorflow Transform 0.15.0
- Depends on Tensorflow Data Validation 0.15.0

* 220 Remove non-ascii characters from the README, prevented training on `ml-engine` with Python3

- 218 Fix typo in supported dataflow args list
- 217 Pin lib version in ephemeral TFDV setup file
- 216 Add docs for stats options

- https://github.com/spotify/spotify-tensorflow/pull/208 Bump Tensorflow to 1.14.0, TFX libraries to 0.14.x

- https://github.com/spotify/spotify-tensorflow/pull/209 Use model_name_suffix in _get_job_name()
- https://github.com/spotify/spotify-tensorflow/pull/210 Add python-version argument to tensorflow-task
- https://github.com/spotify/spotify-tensorflow/pull/214 Fix python3 dataflow naming
- https://github.com/spotify/spotify-tensorflow/pull/212 Drop required-python line from setup.cfg
- https://github.com/spotify/spotify-tensorflow/pull/200 tfdv: expose infer_feature_shape flag

- 181: (breaking change) Removes default output handling in favor of handling being explicit from the user
- 197: (potentially breaking change) Update all references to ML-Engine to googles now renamed AI-platform
- 196: Update TFX dependency to the new 0.13