Update SDK_VERSIONs in .travis.yml
Update SDK_VERSIONs in .travis.yml

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