Dependants put links in lockfile

[AndrewFerr]

Problem

When another npm/Yarn project pulls in @vector-im/matrix-wysiwyg as a dependency, its lockfile ends up with a dependency on a link file belonging to @vector-im/matrix-wysiwyg-wasm.

This is irritating when the link is a machine-dependent cache path, which can change when updating the lockfile on a different OS than it was last updated on. (Example)

Steps to reproduce

• Initialize a new npm/yarn project
• npm i @vector-im/matrix-wysiwyg or yarn add @vector-im/matrix-wysiwyg

Result:
If using npm, package-lock.json will contain:

    "node_modules/@vector-im/matrix-wysiwyg": {
      ...
      "dependencies": {
        "@vector-im/matrix-wysiwyg-wasm": "link:../../bindings/wysiwyg-wasm"
      },
      ...
    },

If using yarn v1.x, yarn.lock will contain:

"@vector-im/matrix-wysiwyg@^2.40.0":
  ...
  dependencies:
    "@vector-im/matrix-wysiwyg-wasm" "link:../../.cache/yarn/v6/npm-@vector-im-matrix-wysiwyg-2.40.0-53c9ca5ea907d91e4515da64f20a82e5586b882c-integrity/node_modules/bindings/wysiwyg-wasm"

If using yarn >v1, yarn.lock will contain:

"@vector-im/matrix-wysiwyg-wasm@link:../../bindings/wysiwyg-wasm::locator=%40vector-im%2Fmatrix-wysiwyg%40npm%3A2.40.0":
  version: 0.0.0-use.local
  resolution: "@vector-im/matrix-wysiwyg-wasm@link:../../bindings/wysiwyg-wasm::locator=%40vector-im%2Fmatrix-wysiwyg%40npm%3A2.40.0"
  languageName: node
  linkType: soft

"@vector-im/matrix-wysiwyg@npm:^2.40.0":
   ...
  dependencies:
    "@vector-im/matrix-wysiwyg-wasm": "link:../../bindings/wysiwyg-wasm"