Bump spring.version from 5.1.9.RELEASE to 5.2.0.RELEASE

Bumps `spring.version` from 5.1.9.RELEASE to 5.2.0.RELEASE.

Updates `spring-framework-bom` from 5.1.9.RELEASE to 5.2.0.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.1.9.RELEASE...v5.2.0.RELEASE)

Updates `spring-webmvc` from 5.1.9.RELEASE to 5.2.0.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.1.9.RELEASE...v5.2.0.RELEASE)

Updates `spring-test` from 5.1.9.RELEASE to 5.2.0.RELEASE
- [Release notes](https://github.com/spring-projects/spring-framework/releases)
- [Commits](spring-projects/spring-framework@v5.1.9.RELEASE...v5.2.0.RELEASE)

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

pom.xml

@@ -72,7 +72,7 @@
         <maven.compiler.target>${java.version}</maven.compiler.target>
         <slf4j.version>1.7.28</slf4j.version>
         <jackson.version>2.10.0.pr2</jackson.version>
-        <spring.version>5.1.9.RELEASE</spring.version>
+        <spring.version>5.2.0.RELEASE</spring.version>
         <spring-boot.version>2.1.8.RELEASE</spring-boot.version>
         <spring-security.version>5.1.6.RELEASE</spring-security.version>
         <junit-jupiter.version>5.5.2</junit-jupiter.version>