add scope and state

Author: patricklx

src/plugin.ts

@@ -181,7 +181,7 @@ export function makePlugin<EnvSpecificOptions>(loadOptions: (opts: EnvSpecificOp
         // also use hbs format, so that other plugins can change the hbs part.
         const targetFormat = this.opts.targetFormat;
         this.opts.targetFormat = 'hbs';
-        babel.traverse(file.ast, plugin.visitor);
+        babel.traverse(file.ast, plugin.visitor, file.scope, this);
         this.opts.targetFormat = this.opts.targetFormat;
       },
       visitor: {