Issue with different escpos version

Nobody has claimed this yet.

I have installed this package via `yarn add escpos`, of which the [latest released version in Github](https://github.com/song940/node-escpos/releases/tag/v2.4.4) is 2.4.4. However, the version which got installed is 2.5.2, as is in this [repository's master package.json](https://github.com/song940/node-escpos/blob/master/package.json#L3).

Also, the odd thing is that even though the Github master version and my installed version of escpos's package.json is same (i.e., 2.5.2), but I have found some missing code in [printer.js](https://github.com/song940/node-escpos/blob/master/printer.js). Meaning some of the code which is present in this repository's [printer.js](https://github.com/song940/node-escpos/blob/master/printer.js#L27) is not present in the printer.js installed in my pc.

Eg.
This is in the [repository's printer.js](this.width = options && options.width || 48;), which is not in my installed version of printer.js.
`this.width = options && options.width || 48;`

How can I correct this?

Compare the released v2.4.4 package, the repository's master package.json and printer.js, and the installed escpos files described in the report. Determine which published artifact or version metadata differs, then document the discrepancy and verify that the installed package matches the intended release contents.

Written by the indexing model from the issue text.