Bump springframework.version

Bumps `springframework.version` from 5.0.6.RELEASE to 5.2.3.RELEASE. Updates `spring-webmvc` from 5.0.6.RELEASE to 5.2.3.RELEASE - [Release notes](https://github.com/spring-projects/spring-framework/releases) - [Commits](spring-projects/spring-framework@v5.0.6.RELEASE...v5.2.3.RELEASE) Updates `spring-tx` from 5.0.6.RELEASE to 5.2.3.RELEASE - [Release notes](https://github.com/spring-projects/spring-framework/releases) - [Commits](spring-projects/spring-framework@v5.0.6.RELEASE...v5.2.3.RELEASE) Updates `spring-orm` from 5.0.6.RELEASE to 5.2.3.RELEASE - [Release notes](https://github.com/spring-projects/spring-framework/releases) - [Commits](spring-projects/spring-framework@v5.0.6.RELEASE...v5.2.3.RELEASE) Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

08-spring-rest/solution-code-spring-crm-rest-demo-add-customer/pom.xml

@@ -8,7 +8,7 @@
 <packaging>war</packaging>
 
 <properties>
-<springframework.version>5.0.6.RELEASE</springframework.version>
+<springframework.version>5.2.3.RELEASE</springframework.version>
 <hibernate.version>5.4.1.Final</hibernate.version>
 <mysql.connector.version>5.1.45</mysql.connector.version>
 <c3po.version>0.9.5.4</c3po.version>