Add a new loader that provides publication impact factor by DOI

[const8ine]

Develop a loader that provides publication impact factor by DOI.
Loader is an exported function that takes doi (string) as an argument. It makes an HTTP request into third-party API, receives a response body, parses it and returns impact factor (number).
You should make your own research and find an API that provides such data by yourself.

Loader example: https://github.com/open-genes/og-publications-search-api/blob/master/loaders/plumx-api.js

Disambiguation

A DOI, or Digital Object Identifier, is a string of numbers, letters and symbols used to uniquely identify a scientific publication.
DOI examples:

• [10.1007/b136753]
• [10.1007/978-3-540-46129-6]
• [10.1002/jcp.24266]
• [10.1073/pnas.1506538112]
• [10.5551/jat.41335]
• https://doi.org/10.1007/b136753

The impact factor (IF) is a measure of the frequency with which the average article in a journal has been cited in a particular year.