[Snyk] Security upgrade ruby from 2.5.1-alpine to 2.6.8-alpine#2

snyk-bot wants to merge 1 commit intomasterlirantal/docker-travis-cli:masterfrom

snyk-fix-4e005a3e8f8a44e2afb31504960acbb0lirantal/docker-travis-cli:snyk-fix-4e005a3e8f8a44e2afb31504960acbb0Copy head branch name to clipboard