High severity security warning on npm install

## To reproduce

```
npm install
```

## Description

This is due to the `minizlib` dependency and, more specifically, to the `cross-spawn` sub-dependency:

```
tar > minizlib > rimraf > glob > foreground-child > cross-spawn@7.0.3
```

Tracked for `minizlib` at:

https://github.com/isaacs/minizlib/issues/33