Update geerlingguy versions

[DonRichards]

GitHub Issue: Islandora/documentation#1343
The build fails to build. Looks like a version problem.

What does this Pull Request do?

Updates 3 roles geerlingguy.php, geerlingguy.php-versions, geerlingguy.mysql

What's new?

geerlingguy.php -> v4.0.0
geerlingguy.php-versions -> v4.0.0
geerlingguy.mysql -. v3.1.0

How should this be tested?

Remove external roles, build and get a fail

$ vagrant destroy -f
$ rm -rf roles/external/*
$ vagrant up

Remove external roles, switch to this PR, build again and it will pass

$ vagrant destroy -f
$ rm -rf roles/external/*
# switch to this PR
$ vagrant up

Additional Notes:

N/A

Interested parties

@Islandora-Devops/committers

[whikloj]

My build works without this PR and it also works with this PR. So I'm fine merging this just to update the dependency.