less.render not support syncImport:true rendering @import

[huanshiwushuang]

Describe the bug

less.render() does not support synchronous rendering @import. The syncImport attribute is invalid. If there is an @import string and syncImport: true, the callback function will never be called

The code from @vue/compiler-sfc/dist/compiler-sfc.cjs.js

nodeLess.render(getSource(source, options.filename, options.additionalData), Object.assign(Object.assign({}, options), { syncImport: true }), (err, output) => {
        error = err;
        result = output;
    });

To Reproduce

Expected behavior

Versions

• Browser (name & version): chrome 92.0.4515.131
• vue3-sfc-loader: https://cdn.jsdelivr.net/npm/vue3-sfc-loader@0.8.4/dist/vue2-sfc-loader.esm.js

Additional context

[FranckFreiburger]

Duplicate of #54