[Snyk] Security upgrade rack from 1.6.4 to 2.2.20#20

ppradnesh wants to merge 1 commit intomasterppradnesh/ruby-ex:masterfrom

snyk-fix-c8aadbc547c47f05fcb8c3ba747ade9dppradnesh/ruby-ex:snyk-fix-c8aadbc547c47f05fcb8c3ba747ade9dCopy head branch name to clipboard