babel-preset: handles relative paths as assets

[layershifter]

In the fixture below assetWithHash contains a url() that uses relative path (not imported path).

griffel/packages/babel-preset/__fixtures__/assets/code.ts

Lines 7 to 12 in eb26eaf

	export const useStyles = makeStyles({
	rootA: { backgroundImage: `url(${blank})` },
	rootB: { backgroundImage: `url("${blankDuplicate}")` },
	rootC: { backgroundImage: `url(${empty})` },
	assetWithHash: { filter: 'url(./a.svg#a)' },
	});

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griffel/packages/babel-preset/__fixtures__/assets/output.ts

Line 27 in eb26eaf

`.fv04sme{-webkit-filter:url(${_asset3}#a);filter:url(${_asset3}#a);}`,

url() there should not be transformed there, but it gets 💥
It seems that without migration to Linaria v4 (#184) that uses absolute paths it will be impossible to handle this scenario properly.