Update swagger-ui version to 5.9.0. Fixes #2382

Author: bnasslahsen

pom.xml

@@ -62,7 +62,7 @@
 		<maven-release-plugin.version>2.5.3</maven-release-plugin.version>
 		<nexus-staging-maven-plugin>1.6.8</nexus-staging-maven-plugin>
 		<swagger-api.version>2.2.17</swagger-api.version>
-		<swagger-ui.version>5.7.2</swagger-ui.version>
+		<swagger-ui.version>5.9.0</swagger-ui.version>
 		<gmavenplus-plugin.version>1.13.1</gmavenplus-plugin.version>
 		<jaxb-impl.version>2.1</jaxb-impl.version>
 		<javax.jws-api.version>1.1</javax.jws-api.version>