This change disables colorama wrapping on versions of Windows prior to
10.

Currently, this wrapping causes "TypeError: cannot use a string
pattern on a bytes-like object" on Windows 7 and 8.1 when running
`gclient sync`, `gclient fetch`, and other utilities that use
colorama.

Bug: 1114548
Change-Id: Id6b4a6f9a8ae0721765da34b5625b4524b9d36b1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/2485882Reviewed-by: Josip Sokcevic <sokcevic@google.com>
Commit-Queue: Jesse McKenna <jessemckenna@google.com>