logger: add TensorBoard without tensorFlow
Is your feature request related to a problem.
any way to get rid of the TensorFlow dependency?
Describe alternatives you've considered
See discussion in #265.
Additional context

https://gist.github.com/wchargin/d3ab370042a3a2c66c495ef814c36354
https://gist.github.com/gyglim/1f8dfb1b5c82627ae3efcfbbadb9f514#gistcomment-3010311