ESC/POS library

Features:

- Adapters for Network, Serial, and Console (for debugging)
- Usual text stuff (Bold, Underline, Justification etc.)
- PNG images
- Bar code printing (Regular, QR, PDF417)

Usage example:

``javascript
import Printer from 'escpos-print/Printer'
import { Font, Justification, TextMode } from 'escpos-print/Commands'
import { Network } from 'escpos-print/Adapters'

const adapter = new Network("192.168.0.102", 9100)
const printer = await new Printer(adapter).open()

printer.setFont(Font.A)
.setJustification(Justification.Center)
.setTextMode(TextMode.DualWidthAndHeight)
.writeLine("This is some large centered text")
.setTextMode(TextMode.Normal)
.setJustification(Justification.Left)
.writeLine("Some normal text")
.feed(4)
.close()
.then(() => console.log("Done printing..."))
``