Can't setup by Swift Packages

[sglushchenko]

When I try setup this library to my project by Swift Packages Manager I have error

package 'FBLFunctional' contains no products

I think you should add products field to Package.swift file

similar with AFNetworking

https://github.com/AFNetworking/AFNetworking/blob/master/Package.swift

Thank you

[shoumikhin]

Hi @sglushchenko,

Please send a PR our way, happy to merge in a fix!

Thanks.