Jiaming Yuan 7aec915dcd
[Backport] Rename data to X in predict_proba. (#6555) (#6586)
* [Breaking] Rename `data` to `X` in `predict_proba`. (#6555)

New Scikit-Learn version uses keyword argument, and `X` is the predefined
keyword.

* Use pip to install latest Python graphviz on Windows CI.

* Suppress health check.
2021-01-10 16:05:17 +08:00
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