[Snyk] Security upgrade ruby from 2.5.1-alpine to 2.6.8-alpine#5

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

snyk-fix-ca09f2e0a63fbc29bb0de8ae529473c2lirantal/docker-travis-cli:snyk-fix-ca09f2e0a63fbc29bb0de8ae529473c2Copy head branch name to clipboard