TensorFlow 1.13 support

[yongtang]

There are some tf.data API changes between TensorFlow 1.12 and 1.13 which breaks the build of tensorflow-io. This issue is created to track the the effort needed to provide TensorFlow 1.13 support for tensorflow-io.

[yongtang]

We will need to carry tensorflow/tensorflow#24899 and tensorflow/tensorflow#24903 once we switch from TensorFlow 1.12 to TensorFlow 1.13.

[yongtang]

Added the comment here as well:

I am continuing to play with tf 1.12.0 vs. 1.13.0. Noticed that the C++ binaries build against 1.12.0 will not work with 1.13.0, as the following has changed:

# 1.12.0:
tensorflow::kernel_factory::OpKernelRegistrar::InitInternal( \
  tensorflow::KernelDef const*, absl::string_view, \
  tensorflow::OpKernel* (*)(tensorflow::OpKernelConstruction*))
# 1.13.0
tensorflow::kernel_factory::OpKernelRegistrar::InitInternal( \
  tensorflow::KernelDef const*, absl::string_view, \
  std::unique_ptr<tensorflow::kernel_factory::OpKernelFactory, \
  std::default_delete<tensorflow::kernel_factory::OpKernelFactory> >)

That means we do have to release a binary against 1.13.0 even if we use tensorflow's public endpoint Python API.

[yongtang]

/cc @jsimsa