Bump spring-webmvc from 3.0.5.RELEASE to 5.2.21.RELEASE in /backend#8

dependabot[bot] wants to merge 1 commit intomasterMloweedgar/MapStore2:masterfrom

dependabot/maven/backend/org.springframework-spring-webmvc-5.2.21.RELEASEMloweedgar/MapStore2:dependabot/maven/backend/org.springframework-spring-webmvc-5.2.21.RELEASECopy head branch name to clipboard