[Git::CheckFor::MergeConflicts] issues resolved
add irc and mailinglist metadata
PodWeaver 4 now includes -SingleEncoding
remove backcompat code for Dist::Zilla 4
also check for declared dependencies on things like inc::Foo
Dist-Zilla-Plugin-CheckSelfDependency-0.006

          - now also checking for develop prereqs, that aren't listed in
            'provides' metadata