Update dependency limits

[mjksohonet]

Hi, the current version of the puppetlabs-stdlib module is 8.4.0. Please update the dependency limits so that we can avoid problems like:

[Librarian]     Checking sensu-sensu/5.8.0 <https://forgeapi.puppetlabs.com/>
[Librarian]       Resolved sensu-sensu (= 5.8.0) <https://forgeapi.puppetlabs.com/> (from Puppetfile) at sensu-sensu/5.8.0 <https://forgeapi.puppetlabs.com/>
[Librarian]   Resolved sensu-sensu (= 5.8.0) <https://forgeapi.puppetlabs.com/> (from Puppetfile)
[Librarian] Conflict between puppetlabs-stdlib (< 9.0.0, >= 7.0.0) <https://forgeapi.puppetlabs.com/> (from puppet-puppetboard) and puppetlabs-stdlib (< 7.0.0, >= 5.1.0) <https://forgeapi.puppetlabs.com/> (from sensu-sensu)
Could not resolve the dependencies.

[thepro101]

Any update on this? This sensu module has been holding up our entire environment