Bump spring-webmvc from 4.3.4.RELEASE to 5.2.20.RELEASE in /backend/tipdm-server#83

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dependabot/maven/backend/tipdm-server/org.springframework-spring-webmvc-5.2.20.RELEASEGZTipDM/TipDM:dependabot/maven/backend/tipdm-server/org.springframework-spring-webmvc-5.2.20.RELEASECopy head branch name to clipboard