lady Liu

This is error at pnpm-lock file. ```yaml /egg-mock/3.26.0: resolution: {integrity: sha1-U/2IJsPnCg4o+8DFNsuRRKsVwbc=, tarball: https://xx.com/artifactory/api/npm/npm-down/egg-mock/-/egg-mock-3.26.0.tgz} engines: {node: '>= 6.0.0'} dependencies: '@types/power-assert': 1.5.8 '@types/supertest': 2.0.12 await-event: 2.1.0 co: 4.6.0 coffee: 5.4.0 debug: 4.3.4...

why i overrides @types/superagent`s version to 4.1.14, if has version 4.1.15 at pnpm-store, this not auto download 4.1.14 but throw an error like this: ```yaml ERR_PNPM_UNEXPECTED_PKG_CONTENT_IN_STORE  Package name mismatch found...

This seems the version of 4.1.14 and 4.1.15`s integrity at pnpm-lock is the same, this maybe an error.

yes , this can be closed

> @WormGirl Maybe this is not a pnpm releated bug > > have u installeted `pnpm` using `npm install -g pnpm` (or yarn) ? > > in this case,[ you...

10万条数据，stream可以实现么

如果改成支持流，是不是分段加密就可以，然后再分段解密，那是不是要加段标记，这样是不是就能实现了，自定义一个transform流去分段加解密

只考虑xlsx，office和wps都要支持，这两个对xlsx的加密方式还不一样么 ， 文件多大无法估计，因为有多少列不是确定的，1GB也不是不可能，那cfb我简单看了下，试过只截断给前面的字节，无法解析的

我看你这边还提供了一个https://github.com/zurmokeeper/excelize 内置这个加密的，这个支持stream模式给excel加密码么

i run this test file, the export file not correct too,, the sheet name should be blort, https://github.com/exceljs/exceljs/blob/master/test/testCsvOut.js