`puppetlabs_spec_helper` gem requires `puppet-syntax` ~> 4.1

## Describe the Bug

The `puppetlabs_spec_helper` gem requires `puppet-syntax` ~> 4.1 which is very old and this causes conflicts with other gems that require e.g. `puppet-syntax` >= 6 

## Expected Behavior

Bump the requirement to `puppet-syntax` < 8

## Steps to Reproduce



## Environment

## Additional Context


