refactor(api): 去除代码版本命名

web-demo/app.js

@@ -3,7 +3,7 @@ const esc = value => String(value).replace(/[&<>"']/g, char => ({'&':'&amp;','<'
 const findBook = id => books.find(book => book.id === id);
 const uniqueIds = ids => [...new Set(ids)].filter(id => findBook(id));
 const today = () => new Date().toLocaleDateString('sv-SE');
-const storageKey = 'weread-demo-goals-v2';
+const storageKey = 'weread-demo-goals';
 let page = 'overview', shelfTab = 'reading', discoverTab = 'books', searchQuery = '', period = 'week';
 let noteBook = 'all', noteType = 'all', goalFilter = 'all', dataState = 'ready';
 let detailBook = null, bookTab = 'info', reviewFilter = '全部', selectedChapter = 'all';