fix: api/pom.xml to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade: - https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-31689 - https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORK-31690 - https://snyk.io/vuln/SNYK-JAVA-ORGSPRINGFRAMEWORKSECURITY-32123

Author: snyk-bot

api/pom.xml

@@ -20,8 +20,8 @@
 
  <servlet.version>3.1.0</servlet.version>
 
- <spring.version>4.3.15.RELEASE</spring.version>
- <spring.security.version>4.2.3.RELEASE</spring.security.version>
+ <spring.version>5.0.8.RELEASE</spring.version>
+ <spring.security.version>4.2.4.RELEASE</spring.security.version>
  <hibernate.version>5.2.4.Final</hibernate.version>
  <hibernate.entity.manager.version>5.1.0.Final</hibernate.entity.manager.version>
  <hibernate.jpa.version>1.0.0.Final</hibernate.jpa.version>