Feature: Add `allowedDepth` option for a limited amount of relative imports

[peterlenahan-apollo]

Implements #31

This will allow consumers to configure an allowed amount of relative imports.

For my use case I would like most imports to be absolute, but would like to allow 2 levels of relative paths such as ../../ or ../ to not be considered a warning.

Let me know what you think, thanks!

[bayasdev]

+1

[chkp-sapirba]

That's great, thanks!