This may not appear to be a big thing, but having no license severely limits the possibilities to legally utilize or participate in this project. Without a license and only subject to the GitHub Terms of Service, users other than the owner only have the right to view and fork the code. Modifying it could actually have legal implications for contributors.

See this answer on StackExchange for more info.

Since this is an active and fairly popular project and people are definitely using and changing it according to their needs, I would like to suggest adding a license to it.

@Edzelf: Would you mind choosing a license for this project and adding it to the repo? It's a 2 minute deal with the help of e.g. this: https://choosealicense.com/