Bump spring.version from 5.3.8 to 5.3.13

Bumps `spring.version` from 5.3.8 to 5.3.13.

Updates `spring-core` from 5.3.8 to 5.3.13
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.8...v5.3.13)

Updates `spring-test` from 5.3.8 to 5.3.13
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.3.8...v5.3.13)

---
updated-dependencies:
- dependency-name: org.springframework:spring-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: org.springframework:spring-test
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -48,10 +48,10 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <axon.version>4.5.2</axon.version>
+        <axon.version>4.5.5</axon.version>
         <projectreactor.version>3.4.7</projectreactor.version>
 
-        <spring.version>5.3.8</spring.version>
+        <spring.version>5.3.13</spring.version>
         <spring.boot.version>2.5.2</spring.boot.version>
 
         <slf4j.version>1.7.28</slf4j.version>