fix(dependencies): fix version comparator for spell-webapp

I'm a novice with NPM, but if I understand the docs correctly, the version comparator for the dependency also needs to have a `-alpha.x` tag so that the current version of `warlock-spell-webapp` which is at `1.0.0-alpha.2` will satisfy it.

> If a version has a prerelease tag (for example, `1.2.3-alpha.3`) then it will only
> be allowed to satisfy comparator sets if at least one comparator with the same
> `[major, minor, patch]` tuple also has a prerelease tag.