Currently version of jackson-databind in sql/core/pom.xml is 2.3.0

This is older than the version specified in root pom.xml

This PR upgrades the version in sql/core/pom.xml so that they're consistent.

Author: tedyu <yuzhihong@gmail.com>

Closes #6028 from tedyu/master and squashes the following commits:

28c8394 [tedyu] Upgrade version of jackson-databind in sql/core/pom.xml