math/R-cran-metafor: New port: Meta-analysis package for R

[longros]

Summary

Meta-analysis package for R. metadat and pbapply are already ported.

Test Plan

poudriere testport passes in 144amd64, 145amd64 and 151

[yuri]

distilator shows that the WWW URL redirects. The redirect target should be in the WWW field.
You should always run distilator for new ports and port updates to check whether important URLs like WWW and MASTER_SITES redirect.