Prevent travis from deleting our release artifacts
Prevent travis from deleting our release artifacts

We need them to release!

dipinhora/ponyc,ponylang/ponyc,sgebbie/ponyc,dipinhora/ponyc,kulibali/ponyc,kulibali/ponyc,cquinn/ponyc,CausalityLtd/ponyc,Theodus/ponyc,jemc/ponyc,CausalityLtd/ponyc,ponylang/ponyc,sgebbie/ponyc,sgebbie/ponyc,sgebbie/ponyc,Theodus/ponyc,cquinn/ponyc,CausalityLtd/ponyc,Theodus/ponyc,ponylang/ponyc,Theodus/ponyc,jemc/ponyc,dipinhora/ponyc,jemc/ponyc,sgebbie/ponyc,kulibali/ponyc,Theodus/ponyc,kulibali/ponyc,cquinn/ponyc,cquinn/ponyc