Bump spring-webmvc from 5.0.2.RELEASE to 5.2.20.RELEASE in /springnews#9

dependabot[bot] wants to merge 1 commit intomastersuyonghan/WebProgramming:masterfrom

dependabot/maven/springnews/org.springframework-spring-webmvc-5.2.20.RELEASEsuyonghan/WebProgramming:dependabot/maven/springnews/org.springframework-spring-webmvc-5.2.20.RELEASECopy head branch name to clipboard