fix: correctly implement interface (#30)

Author: buehler

src/declarations/InterfaceDeclaration.ts

@@ -1,16 +1,18 @@
+import { AccessorDeclaration } from './AccessorDeclaration';
 import { ClassLikeDeclaration, ExportableDeclaration, GenericDeclaration } from './Declaration';
 import { MethodDeclaration } from './MethodDeclaration';
 import { PropertyDeclaration } from './PropertyDeclaration';
 
 /**
  * Interface declaration that contains defined properties and methods.
- * 
+ *
  * @export
  * @class InterfaceDeclaration
  * @implements {ExportableDeclaration}
  * @implements {GenericDeclaration}
  */
 export class InterfaceDeclaration implements ClassLikeDeclaration, ExportableDeclaration, GenericDeclaration {
+    public accessors: AccessorDeclaration[];
     public typeParameters: string[] | undefined;
     public properties: PropertyDeclaration[] = [];
     public methods: MethodDeclaration[] = [];