[Snyk] Upgrade com.google.gwt:gwt-user from 2.4.0 to 2.9.0#3

snyk-bot wants to merge 1 commit intomasterandirdju/myspent:masterfrom

snyk-upgrade-89182014984abda01560fdaa51cfc66aandirdju/myspent:snyk-upgrade-89182014984abda01560fdaa51cfc66aCopy head branch name to clipboard