Create micro:bit Universal Hexes.
npm install @microbit/microbit-universal-hex

TypeScript/JavaScript library to create micro:bit Universal Hex files for
micro:bit.
The Universal Hex file format was created to be able to contain the binary data
for micro:bit V1 and V2 boards in a single file, so that it works in all
versions of the micro:bit.
The documentation can be found in
https://microbit-foundation.github.io/microbit-universal-hex/.
To add this package to your project:
````
npm install @microbit/microbit-universal-hex

An implementation example can be found in the
docs/examples/webtool.html file. This web tool can
generate a Universal Hex from two Intel Hex files.
It can be accessed online on this URL:
https://tech.microbit.org/software/universal-hex-creator/
This software is under the MIT open source license.