These package versions have conflicting dependencies.
 The conflict is caused by:
     The user requested astroid==2.4.2
     pylint 2.7.4 depends on astroid<2.7 and >=2.5.2

Change-Id: Id2724413f18d1cb62a6cc9cb936edf26f245f621
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/3224599
Auto-Submit: Chenlin Fan <fancl@chromium.org>
Reviewed-by: Robbie Iannucci <iannucci@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Dirk Pranke <dpranke@google.com>