[Snyk] Upgrade grunt-contrib-concat from 0.4.0 to 0.5.1#3

snyk-bot wants to merge 1 commit intomasterparys-github/bootstrap-accessibility-plugin:masterfrom

snyk-upgrade-2e0a26368bbbae9e4d9858ae3aa5ec26parys-github/bootstrap-accessibility-plugin:snyk-upgrade-2e0a26368bbbae9e4d9858ae3aa5ec26Copy head branch name to clipboard