Missing package dependency

[smoke-indica]

Subject of the issue

Missing package dependency.

Your environment

• OS: Windows
• Packages: 3.0.1
• Env: node v12.14.0 , npm 6.13.4

Steps to reproduce

unist-util-select/types/index.d.ts

Line 3 in 3100da1

import {Node} from 'unist'

import {Node} from 'unist'

unist isn't included as a dependency in packages.json

Tried to use v3 in place of v2 in gatsby-remark-images-anywhere, got a warning about missing package dependencies.

Expected behaviour

required package dependency stored in packages.json

Actual behaviour

Missing package dependency, fails to run

[ChristianMurphy]

We've avoided adding direct dependencies on @types/ packages due to the issues outlined in unifiedjs/unified#45 .
When using Typescript add the unist typings using npm install @types/unist.