update base pom ref
<groupId>com.fasterxml.jackson</groupId>
<!-- For 2.9.2 and beyond, new parent pom; extends jackson-bom -->
<artifactId>jackson-base</artifactId>
- <version>2.9.6-SNAPSHOT</version>
+ <version>2.9.6</version>
</parent>
<groupId>com.fasterxml.jackson.core</groupId>
