Merge pull request #684 from swagger-api/bump-codegen

codegen 3.0.21-SNAPSHOT

Author: frantuma

pom.xml

@@ -252,7 +252,7 @@
         </dependency>
     </dependencies>
     <properties>
-        <swagger-codegen-version>3.0.20</swagger-codegen-version>
+        <swagger-codegen-version>3.0.21-SNAPSHOT</swagger-codegen-version>
         <swagger-parser-version>2.0.20</swagger-parser-version>
         <swagger-core-version>2.1.2</swagger-core-version>
         <jackson-version>2.10.3</jackson-version>