Unsupported engine warning, even when node + npm versions meet requirement

[chuank]

Installing this via npm returns the following Unsupported engine warning:

It also appears that the package needs to have some of its dependencies updated (as per screenshot, for formidable, superagent and core-js.

[chuank]

Digging a bit deeper, it appears that the superagent dependency can be trivially upgraded to ^7.0.2.
This will also resolve the formidable dependency in superagent.

The more challenging dependency is [email protected], which still relies on [email protected]. There are quite a few Babel 6 devDependencies being used which I presume will take a while to upgrade to Babel 7?

Edit: also, if the npm engine version is updated to support 9.x, that will be great.