Simplify invalidateOnFileChange() in Transformers

[grishy]

↪️ Pull Request

In docs/code:

invalidateOnFileChange(FilePath): void

You don't need to add await before

💻 Examples

🚨 Test instructions

✔️ PR Todo

• Added/updated unit tests for this change
• Filled out test instructions (In case there aren't any unit tests)
• Included links to related issues/PRs

[mischnic]

There's actually one more case here which could just be a for loop without any Promises:

parcel/packages/transformers/posthtml/src/PostHTMLTransformer.js

Lines 108 to 115 in d58e336

	await Promise.all(
	res.messages.map(({type, file: filePath}) => {
	if (type === 'dependency') {
	return asset.invalidateOnFileChange(filePath);
	}
	return Promise.resolve();
	}),
	);

[grishy]

Oh, I see. I will update it, if you want in this PR.

[mischnic]

Thanks!