fix: css experiment detection (#1559)

Author: alexander-akait

src/index.js

@@ -39,7 +39,10 @@ export default async function loader(content, map, meta) {
     this._compiler.options.experiments &&
     this._compiler.options.experiments.css &&
     this._module &&
-    this._module.type === "css"
+    (this._module.type === "css" ||
+      this._module.type === "css/auto" ||
+      this._module.type === "css/global" ||
+      this._module.type === "css/module")
   ) {
     this.emitWarning(
       new Error(