Update dependency io.swagger:swagger-annotations to v1.6.13

Author: renovate[bot]

pom.xml

@@ -160,7 +160,7 @@
         <spring-boot.version>2.1.9.RELEASE</spring-boot.version>
         <spring-cloud-dependencies.version>Greenwich.RELEASE</spring-cloud-dependencies.version>
         <spring-cloud-starter-hystrix.version>1.4.6.RELEASE</spring-cloud-starter-hystrix.version>
-        <swagger-annotations.version>1.6.2</swagger-annotations.version>
+        <swagger-annotations.version>1.6.13</swagger-annotations.version>
         <snakeyaml.version>1.27</snakeyaml.version>
         <!-- Version 3.1.8 throws an NPE - UPGRADE WITH CARE -->
         <swagger-maven-plugin.version>3.1.7</swagger-maven-plugin.version>