Refactor to refer more representational plug-ins in `readme`
Refactor to refer more representational plug-ins in `readme`

ulrikaugustsson/mdast,chcokr/mdast,eush77/remark,wooorm/remark,chcokr/mdast,yukkurisinai/mdast,tanzania82/remarks,yukkurisinai/mdast,eush77/remark,ulrikaugustsson/mdast