Summary:
Pull Request resolved: https://github.com/facebook/Ax/pull/444

To make the new contextual libraries happy, bump the botorch version (see failures in: https://fburl.com/kbkoen5s)

Reviewed By: lena-kashtelyan

Differential Revision: D25397593

fbshipit-source-id: c711ebb9d99477b5070d3758251d1d4a8b699b7a