[R-sig-Fedora] New R packages as deps for R-tracklayer

[Tom Callaway]

A few new packages need reviews in order to allow me to update
R-rtracklayer:

* R-KEGGREST: https://bugzilla.redhat.com/show_bug.cgi?id=1972905
* R-BiocIO: https://bugzilla.redhat.com/show_bug.cgi?id=1972915
* R-rjson: https://bugzilla.redhat.com/show_bug.cgi?id=1972920
* R-restfulr: https://bugzilla.redhat.com/show_bug.cgi?id=1972922

Any help here is appreciated.

~spot

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