Feature Request: Ignore just major version updates

The problem that i have is the following:

I'm developing an AWS Lambda function and using `joi` and `lab`, but the recent versions don't support node v6.10, which is the newest version in AWS Lambda.

For example `joi`, i need to use `v12.0.0` instead of `v13.0.1`.

What i want is to ignore just major version updates, so if `joi@12.x.x` is released i want to know, but if `joi@13.x.x` come out, i don't want to be notified because its not compatible with my stack.