fix: correctly import pascalcase function

Author: KnisterPeter

src/typings.ts

@@ -1,10 +1,9 @@
 import ASTQ from 'astq';
 import * as dom from 'dts-dom';
+import { pascalCase } from 'pascal-case';
 import { InstanceOfResolver, IOptions } from './index';
 import * as types from './types';
 
-import pascalCase = require('pascal-case');
-
 export interface AstQuery {
   ast: any;
   query(query: string): any[];