`NEWS.md` file for changelog?

[msberends]

Hi! Thanks for this package.

I noticed that this package has no NEWS or NEWS.md file containing the changelog of the different versions of this package. That would be very helpful, since it is now unknown what a new package version (e.g., from 1.1 to 1.2) brings.

Furthermore, it is a strict requirement of the GPL >=2 license to document changes (see here for the explanation on choosealicense.com). That being said, this package also lacks a LICENSE file, so the only hint that this package is licensed under GPL is in the DESCRIPTION file. I suggest to use e.g. usethis::use_gpl3_license() which will add the required license file automatically. Alternatively, the text can be copied from https://choosealicense.com/licenses/gpl-2.0/ for GPL-2.0 and from https://choosealicense.com/licenses/gpl-3.0/ for GPL-3.