Bump spring-core from 5.2.13.RELEASE to 5.3.14 in /eXperDB-Proxy-Agent

Bumps [spring-core](https://github.com/spring-projects/spring-framework) from 5.2.13.RELEASE to 5.3.14.
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.2.13.RELEASE...v5.3.14)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

eXperDB-Proxy-Agent/pom.xml

@@ -12,7 +12,7 @@
 
 	<properties>
 		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-		<spring-framework.version>5.2.13.RELEASE</spring-framework.version>
+		<spring-framework.version>5.3.14</spring-framework.version>
 		<slf4j.version>1.7.30</slf4j.version>
 		<log4j.version>1.2.17</log4j.version>
 		<spring-security.version>5.2.8.RELEASE</spring-security.version>