fix: swap @yields for @returns

[gobengo]

Motivation:

• Fix error importing ipfs-core from TypeScript "Cannot find namespace 'fs'." js-ipfs#4080
• tl;dr
  • fix import globSourceImport from 'ipfs-utils/src/files/glob-source.js' from typescript
  • fix importing ipfs-core from typescript

Context:

• JSDoc support for @yields microsoft/TypeScript#23857

Strategy

• Use jsdoc @return instead of @yields because tsc doesn't understand that @yields implies a @return type

Test Case

• recreate error with only ipfs-utils, not ipfs-core gobengo/ipfs-core-esm-test#3
• I tested locally with npm link and this seemed to fix it

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🎉 This PR is included in version 9.0.6 🎉

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