[Snyk] Security upgrade mocha from 2.5.3 to 6.0.0#4

snyk-bot wants to merge 1 commit intomasteravnertzur/nodejs-ex:masterfrom

snyk-fix-9130f997ad59656cf3e76e6ec2426dc4avnertzur/nodejs-ex:snyk-fix-9130f997ad59656cf3e76e6ec2426dc4Copy head branch name to clipboard