sheetjs

This is a placeholder package for SheetJS. If you are
looking for spreadsheet-related libraries:

- xlsx File I/O
- codepage Character Encodings
- cfb OLE and ZIP utilities
- crc-32 CRC-32 library
- ssf value formatter

Thanks to @jshanson7 for graciously letting us
put up this placeholder. The original project that used the name sheetjs is
and still available on NPM in the 1.x.x
version series.