Update dependency io.swagger:swagger-annotations to v1.6.3

Author: renovate-bot

swagger-android-client/pom.xml

@@ -145,7 +145,7 @@
     </repository>
   </repositories>
   <properties>
-    <swagger-annotations-version>1.5.4</swagger-annotations-version>
+    <swagger-annotations-version>1.6.3</swagger-annotations-version>
     <gson-version>2.3.1</gson-version>
     <junit-version>4.8.1</junit-version>
     <maven-plugin-version>1.0.0</maven-plugin-version>