Upgrade to spring-boot v2.2.3.RELEASE

Author: dyroberts

pom.xml

@@ -39,7 +39,7 @@
         <maven.compiler.source>${java.version}</maven.compiler.source>
         <maven.compiler.target>${java.version}</maven.compiler.target>
 
-        <spring-boot.version>2.2.1.RELEASE</spring-boot.version>
+        <spring-boot.version>2.2.3.RELEASE</spring-boot.version>
         <jmockit.version>1.24</jmockit.version>
 
         <!-- Plugins -->