[RELEASE] integration v21.06 - #298

Update Numba version to >=0.53.1

Update Axes for `branch-0.20`

Allow blazing builds to fail pipeline

Add pydocstyle to environment.

Update jupyterlab version

Signed-off-by: Jordan Jacobelli <jjacobelli@nvidia.com>

Add 21.08 to axis

Support Dask + Distributed 2021.05.1

[REVIEW] Adding hdbscan for cuml test dependency

Upgrade NCCL to 2.9.9

[REVIEW] FIX Update cugraph test dir

Add `nbsphinx` version spec

This PR adds a flag to ignore the `raft` unit tests in the `cugraph` repo since those tests are meant to be run from the `raft` repo itself (and not a downstream repo).

Ignore `raft` unit tests for `cugraph` [skip ci]

This PR removes `21.08.00.a` from the axis for `branch-21.06`

Remove `21.08` from axis [skip ci]

Update xgboost version

[REVIEW] FIX Install rapids pytest benchmark

Fix `cugraph` flag path