Update jackson-core/jackson-databind versions
Update jackson-core/jackson-databind versions

We're currently running into the following error when using
s3-wagon-private in a project that uses the latest AWS SDK:

Exception in thread "main" Exception in thread "pool-3-thread-1" java.lang.NoSuchMethodError: com.fasterxml.jackson.databind.JavaType.isReferenceType()Z

This commit upgrades the versions of jackson-core and jackson-databind
to the latest versions - which fixes this issue for us.

s3-wagon-private/s3-wagon-private,technomancy/s3-wagon-private