Get rid of warnings on Kredits initialization

[raucao]

Every kredits client displays 5 rows of warnings when it initalizes a new Kredits prototype:

WARNING: Multiple definitions for newAppProxy
WARNING: Multiple definitions for newAppProxyPinned
WARNING: Multiple definitions for newAppInstance
WARNING: Multiple definitions for newPinnedAppInstance
WARNING: Multiple definitions for canPerform

[bumi]

I looked at that awhile ago but did not find a solution. I think it is related to ethers.js

[raucao]

Example from ipfs-pinner:

[raucao]

Found the code in ethers (you can search for "Multiple definitions" in there). We'd have to do a PR to maybe change the log level it's using for those warnings (to debug instead of warn).