Update p-queue to the latest version 🚀 (#353)

* fix(package): update p-queue to version 6.0.0

* Update p-queue requirement

Author: greenkeeper[bot]

lib/scraper.js

@@ -1,5 +1,5 @@
 const Promise = require('bluebird');
-const PromiseQueue = require('p-queue');
+const {default: PromiseQueue} = require('p-queue');
 
 const logger = require('./logger');
 

package.json

@@ -41,7 +41,7 @@
     "he": "^1.1.0",
     "lodash": "^4.17.5",
     "normalize-url": "^4.0.0",
-    "p-queue": "^5.0.0",
+    "p-queue": "^6.0.0",
     "request": "^2.85.0",
     "srcset": "^2.0.0"
   },