chromedriver cask will not install from `make bootstrap` without tapping homebrew/cask

Overview

On a fresh install of macOS Big Sur (11.0), I encountered the following error while running make bootstrap:

Error: Cask 'chromedriver' is unavailable: No Cask with this name exists. Installing chromedriver has failed! Homebrew Bundle failed! 1 Brewfile dependency failed to install.

This prevents the rest of the bootstrap command from completing.

Proposal (optional)

Update support/bootstrap to include the following command, so that the chromedriver cask can be accessed: brew tap homebrew/cask

Environment (optional)

• Operating System: macOS Big Sur 11.0.1