Get more than 10 parameters #39

It seems aws-ssm get only 10 parameters using directory when it syncs, and I can't find any configuration to make it get more than 10 parameters for a single secret with directory configuration.

I want to request one of

1. Get many params at once using MaxItems
2. Get all params using pagination.

and this may not be needed

• Add an annotation to set parameter count to get.