Upgrading jackson dependency for security fix. (#124)

Author: DavidOgunsAWS

sdk/pom.xml

@@ -59,7 +59,7 @@
     <dependency>
       <groupId>com.fasterxml.jackson.core</groupId>
       <artifactId>jackson-core</artifactId>
-      <version>2.10.3</version>
+      <version>2.12.0</version>
     </dependency>
   </dependencies>