Add dependency to documentation

Hi, there missing dependency for yum in thise page:

https://lemonldap-ng.org/documentation/2.0/prereq

yum install perl-Moose yum install perl-Email-Simple yum install perl-Email-Abstract yum install perl-Email-Address

Those package are mendatory to install: http://people.parinux.org/~seyman/1436076/SRPMS/ Also add requirement for the last one in the page