fix: generate sourcemap with hires (#382) (#384)

Author: lishaobos

src/core/ctx.ts

@@ -193,7 +193,7 @@ ${dts}`.trim()}\n`
 
     return {
       code: s.toString(),
-      map: s.generateMap({ source: id, includeContent: true }),
+      map: s.generateMap({ source: id, includeContent: true, hires: true }),
     }
   }