pen. ciun. jian.

Results 2 issues of pen. ciun. jian.

### Description When running the [example code](https://mschauer.github.io/CausalInference.jl/latest/#Example-1), core dumped when calling functions in CausalInference.jl. ### How to reproduce ```shell julia> using Distributions, CausalInference, LightGraphs, DelimitedFiles, LinearAlgebra, Statistics julia> p =...

### Description TensorFlow 2.0 has no attribute `to_float`. ### Environment information ``` OS: Windows 10 Home Edition $ pip freeze | grep tensor mesh-tensorflow==0.1.4 tensor2tensor==1.14.1 tensorboard==2.0.1 tensorflow==2.0.0 tensorflow-datasets==1.3.0 tensorflow-estimator==2.0.1 tensorflow-gan==2.0.0...