Pagination and Calendar Components Are not Localizable to English

[mazz]

Bug report（问题描述）

Pagination component found at this path is not localizable to English:
import Pagination from '@/components/Pagination'

Calendar component is not localizable to English:
el-date-picker

Year, month and day values appear in Chinese.

Other relevant information（格外信息）

• Your OS:
  Mac OS X 10.15
• Node.js version:
  11.15.0
• vue-element-admin version:
  2.7.0

[PanJiaChen]

#2741