Mention tests require Node 6+ in CONTRIBUTING
Mention tests require Node 6+ in CONTRIBUTING

kiejo/prosemirror,salzhrani/prosemirror,tzuhsiulin/prosemirror,kiejo/prosemirror,tzuhsiulin/prosemirror,salzhrani/prosemirror,salzhrani/prosemirror,tzuhsiulin/prosemirror,kiejo/prosemirror