Bump spring-webmvc from 4.3.7.RELEASE to 5.3.18

Bumps [spring-webmvc](https://github.com/spring-projects/spring-framework) from 4.3.7.RELEASE to 5.3.18.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](https://github.com/spring-projects/spring-framework/compare/v4.3.7.RELEASE...v5.3.18

)

---
updated-dependencies:
- dependency-name: org.springframework:spring-webmvc
  dependency-type: direct:production
...
Signed-off-by: dependabot[bot] <support@github.com>

pom.xml

@@ -235,7 +235,7 @@
         <dependency>
             <groupId>org.springframework</groupId>
             <artifactId>spring-webmvc</artifactId>
-            <version>4.3.7.RELEASE</version>
+            <version>5.3.18</version>
             <scope>provided</scope>
             <optional>true</optional>
         </dependency>