i3 4.10.2
i3 4.10.2

Update version and modernize formula

Closes #81.

Signed-off-by: Dominyk Tiller <53e438f55903875d07efdd98a8aaf887e7208dd3@gmail.com>

UniqMartin/homebrew-x11,princeofdarkness76/homebrew-x11,BrewTestBot/homebrew-x11