Bump jackson.version from 2.9.1 to 2.12.1 in /rest#7

dependabot[bot] wants to merge 1 commit intomasterplummb/java-examples:masterfrom

dependabot/maven/rest/jackson.version-2.12.1plummb/java-examples:dependabot/maven/rest/jackson.version-2.12.1Copy head branch name to clipboard