Merge pull request swagger-api#1151 from swagger-api/bump-jackson

bump jackson to 2.9.9

Author: frantuma

pom.xml

@@ -295,7 +295,7 @@
         <wiremock-version>2.15.0</wiremock-version>
         <surefire-version>2.21.0</surefire-version>
         <commons-lang-version>3.2.1</commons-lang-version>
-        <jackson-version>2.9.8</jackson-version>
+        <jackson-version>2.9.9</jackson-version>
     </properties>
 
 </project>