fix: checking Promise object in filesystem #1782

[jcubic]

This should fix #1782

I'm fixing a bug or typo

• if this is your first time contributing, run npm run add-contributor and follow the prompts to add yourself to the README
• squash merge the PR with commit message "fix: [Description of fix]"

I'm adding a parameter to an existing command X:

• add parameter to the function in src/api/X.js (and src/commands/X.js if necessary)
• document the parameter in the JSDoc comment above the function
• add a test case in __tests__/test-X.js if possible
• if this is your first time contributing, run npm run add-contributor and follow the prompts to add yourself to the README
• squash merge the PR with commit message "feat(X): Added 'bar' parameter"

I'm adding a new command:

• add as a new file in src/api (and src/commands if necessary)
• add command to src/index.js
• update __tests__/test-exports.js
• create a test in src/__tests__
• document the command with a JSDoc comment
• add page to the Docs Sidebar website/sidebars.json
• add page to the v1 Docs Sidebar website/versioned_sidebars/version-1.x-sidebars.json
• if this is your first time contributing, run npm run add-contributor and follow the prompts to add yourself to the README
• squash merge the PR with commit message "feat: Added 'X' command"

[isomorphic-git-bot]

🎉 This PR is included in version 1.24.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀