travis: turn off email notifications
travis: turn off email notifications

pottereric/Vim,VSCodeVim/Vim,westim/Vim,Chillee/VSCodeNeovim,edthedev/Vim,Chillee/Vim,westim/Vim,westim/Vim,edthedev/Vim,AndersenJ/Vim,VSCodeVim/Vim,Chillee/VSCodeNeovim,AndersenJ/Vim,Chillee/Vim,Chillee/VSCodeNeovim,rufusroflpunch/Vim,rufusroflpunch/Vim,wooyea/Vim,pottereric/Vim,wooyea/Vim