fix(文章生成): 修复因为缓存导致的删除的文章还会同步的问题

lib/Downloader.js

@@ -81,7 +81,7 @@ class Downloader {
    * @return {Promise} queue
    */
   async fetchArticles() {
-    const { client, config, _cachedArticles } = this;
+    const { client, config } = this;
     const articles = await client.getArticles();
     if (!Array.isArray(articles.data)) {
       throw new Error(
@@ -95,6 +95,9 @@ class Downloader {
       )
       .filter(article => (config.onlyPublic ? !!article.public : true))
       .map(article => lodash.pick(article, PICK_PROPERTY));
+
+    this._cachedArticles = this._cachedArticles.filter(cache => realArticles.findIndex((item)=>item.slug === cache.slug) != -1);
+
     const queue = new Queue({ concurrency: config.concurrency });
 
     let article;
@@ -105,6 +108,8 @@ class Downloader {
     const findIndexFn = function(item) {
       return item.slug === article.slug;
     };
+
+    const { _cachedArticles } = this;
 
     for (let i = 0; i < realArticles.length; i++) {
       article = realArticles[i];