interface subtyping on the same interface doesn't require invariant typeargs
interface subtyping on the same interface doesn't require invariant typeargs

jemc/ponyc,sgebbie/ponyc,doublec/ponyc,jupvfranco/ponyc,mkfifo/ponyc,dipinhora/ponyc,mkfifo/ponyc,Perelandric/ponyc,Theodus/ponyc,cquinn/ponyc,malthe/ponyc,kulibali/ponyc,Praetonus/ponyc,boemmels/ponyc,Theodus/ponyc,Perelandric/ponyc,cquinn/ponyc,CausalityLtd/ponyc,jonas-l/ponyc,Praetonus/ponyc,darach/ponyc,sgebbie/ponyc,dipinhora/ponyc,Theodus/ponyc,dipinhora/ponyc,Praetonus/ponyc,boemmels/ponyc,kulibali/ponyc,Perelandric/ponyc,ryanai3/ponyc,mkfifo/ponyc,CausalityLtd/ponyc,ponylang/ponyc,lukecheeseman/ponyta,jupvfranco/ponyc,darach/ponyc,Praetonus/ponyc,ponylang/ponyc,jonas-l/ponyc,lukecheeseman/ponyta,malthe/ponyc,Perelandric/ponyc,jonas-l/ponyc,cquinn/ponyc,ryanai3/ponyc,Theodus/ponyc,jupvfranco/ponyc,sgebbie/ponyc,ponylang/ponyc,sgebbie/ponyc,malthe/ponyc,jupvfranco/ponyc,darach/ponyc,mkfifo/ponyc,CausalityLtd/ponyc,jemc/ponyc,boemmels/ponyc,malthe/ponyc,mkfifo/ponyc,jemc/ponyc,kulibali/ponyc,doublec/ponyc,doublec/ponyc,ryanai3/ponyc,sgebbie/ponyc,boemmels/ponyc,Perelandric/ponyc,jupvfranco/ponyc,boemmels/ponyc,lukecheeseman/ponyta,cquinn/ponyc,kulibali/ponyc,Theodus/ponyc