fix

Author: ota-meshi

lib/styles/parser/scss-parser.ts

@@ -10,7 +10,7 @@ import { SCSSSelectorParser } from "./selector/scss-selector-parser"
  */
 export class SCSSParser extends CSSParser {
     protected parseInternal(css: string): postcss.Root {
-        return postcssScss.parse(css)
+        return postcssScss.parse(css) as postcss.Root
     }
 
     protected createSelectorParser(): SCSSSelectorParser {

lib/styles/parser/stylus-parser.ts

@@ -10,7 +10,7 @@ import { StylusSelectorParser } from "./selector/stylus-selector-parser"
  */
 export class StylusParser extends CSSParser {
     protected parseInternal(css: string): postcss.Root {
-        return postcssStyl.parse(css)
+        return postcssStyl.parse(css) as postcss.Root
     }
 
     protected createSelectorParser(): StylusSelectorParser {