This commit is the result of running `yarn eslint --fix` after enabling
the `no-implicit-coercion` ESLint rule. This rule has been added to
our ESLint config here:
https://gitlab.com/gitlab-org/gitlab-eslint-config/merge_requests/14
It seems like every new version of Chrome renders the favicon canvas
differently. This reduces the problems with it by creating a more fault
tolerant check, which compares the color values in the pixels and is
okay if they are within a certain threshold.
