[SwiftLint] Add a aggregate target for linting
[SwiftLint] Add a aggregate target for linting

jeffh/Nimble,Quick/Nimble,abbeycode/Nimble,AnthonyMDev/Nimble,twobitlabs/Nimble,DanielAsher/Nimble,twobitlabs/Nimble,abbeycode/Nimble,phatblat/Nimble,abbeycode/Nimble,jeffh/Nimble,AnthonyMDev/Nimble,Quick/Nimble,DanielAsher/Nimble,AnthonyMDev/Nimble,jeffh/Nimble,phatblat/Nimble,phatblat/Nimble,DanielAsher/Nimble,abbeycode/Nimble,twobitlabs/Nimble,Quick/Nimble,jeffh/Nimble