@metamask/providers@17.2.1 has a reference to `src` folder which is omitted in npm package

[davidyuk]

Our typescript setup fails because of this. This was not the case in 17.2.0.

References to src are in files:

• @metamask/providers/dist/initializeInpageProvider.d.cts:1:22
• @metamask/providers/dist/MetaMaskInpageProvider.d.cts:1:22
• @metamask/providers/dist/StreamProvider.d.cts:1:22

You can also see this at npm
https://www.npmjs.com/package/@metamask/providers/v/17.2.1?activeTab=code
https://www.npmjs.com/package/@metamask/providers/v/17.2.0?activeTab=code

/// <reference path="../src/readable-stream.d.ts" />

was added at the beginning of the above files in the latest package.