Bump ipywidgets from 7.6.2 to 7.6.3
Bump ipywidgets from 7.6.2 to 7.6.3

Bumps [ipywidgets](http://ipython.org) from 7.6.2 to 7.6.3.

Signed-off-by: dependabot[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@github.com>
willmcgugan/rich