Currently FOSSA flags this as an unlicensed project since it cannot detect the License file. It seems that they are looking for .txt file, which is likely why the current file isn't being picked up.
I did some more digging and while LICENSE.txt or LICENSE.md is a best practice, the real issue here is the lack of license declaration in the .gemspec. I'll open another PR for this.
We are using FOSSA to manage license compliance.
Currently FOSSA flags this as an unlicensed project since it cannot detect the License file. It seems that they are looking for .txt file, which is likely why the current file isn't being picked up.