Bump spring-webmvc from 4.2.4.RELEASE to 5.3.18

Bumps [spring-webmvc](https://github.com/spring-projects/spring-framework) from 4.2.4.RELEASE to 5.3.18.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v4.2.4.RELEASE...v5.3.18)

---
updated-dependencies:
- dependency-name: org.springframework:spring-webmvc
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

pom.xml

@@ -7,7 +7,7 @@
 	<packaging>war</packaging>
 	<properties>
 		<java.version>1.8</java.version>
-		<springframework.version>4.2.4.RELEASE</springframework.version>
+		<springframework.version>5.3.18</springframework.version>
 		<slf4j.version>1.7.5</slf4j.version>
 		<logback.version>1.2.0</logback.version>
 		<jsp.version>2.2</jsp.version>