I have a library I want to contribute but I do not see anything in the FAQ or forums (there really should be a better search tool) regarding licenses for contributed libraries.
Can someone tell me what license one can use for a contributed library? I have some restrictions due to my work that requires I license the code a certain way (GPLv2). Will that work with the library manager or does one have to agree to license a library differently?
I don't think there are any restrictions because Library Manager just downloads the library from your GitHub repository.
Click the more info button for the library or find the github repo for it. There should either be a licence file or a header inside the source files.
If not, raise an issue there or send the author an email asking to provide you with permission to use it under your minimum licence or to licence the lib. There should be no problem, but if you were to make millions off code which uses unlicensed code, then you could find your self being sued.
In most countries intellectual property rights means you have 'no rights' to use the software in any way unless it is stated in a licence or letter from the owner giving you permission.