@types/ package in PeerDependencies

Hello.

It looks strange to specify a package `@types/markdown-it` in peerDependencies. Is everything expected here?

I caught an error when installing transitive dependencies
```
└─┬ @diplodoc/transform 4.60.2
  └─┬ @diplodoc/cut-extension 0.7.4
    └─┬ @diplodoc/directive 0.3.3
      └─┬ markdown-it-directive 2.0.6
        └── ✕ missing peer @types/markdown-it@"^12.0.0 || ^13.0.0"
```