Upgrade vagrant_ansible_version?

[mockey]

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What is the current behavior?

Running Ansible 2.7.4 I always get the following warning:

 [WARNING]: You Ansible version is 2.7.4 but this version of Trellis has only
been tested for compatability with Ansible 2.4.0.0 -> 2.5.3. It is advisable to
check for Trellis updates or downgrade your Ansible version.

Besides, there's also a typo: "You" should be "Your".
Otherwise I see no problems, I only get one additional warning:

TASK [wordpress-setup : Warn about deprecated Nginx includes directory] ********
[DEPRECATION WARNING]: Using tests as filters is deprecated. Instead of using 
`result|search` use `result is search`. This feature will be removed in version
 2.9. Deprecation warnings can be disabled by setting 
deprecation_warnings=False in ansible.cfg.

What is the expected or desired behavior?

Maybe this warning could be removed by upgrading vagrant_ansible_version. I don't know if anyone else has tested, but I definitely see no problems here with the current Ansible version.