Fix karma webpack error
Fix karma webpack error

Updating the karma version allows the tests to run.

Was related to https://github.com/karma-runner/karma/issues/1497
parksangkil/react-seed,pseudoramble/fric,aristidesstaffieri/react-pouch,havardh/fagdag-itera-photobooth,Hanked/react-seed-playground,jshearer/website,Hanked/react-seed-playground,aristidesstaffieri/react-pouch,parksangkil/react-seed,haner199401/react-seed,subpublic/react-redux-router,subpublic/react-redux-router,badsyntax/react-seed,TCotton/diceware-react-flux,haner199401/react-seed,continuata/react-seed,DiUS/guardian,badsyntax/react-seed,DiUS/guardian,pseudoramble/fric,jshearer/website,TCotton/diceware-react-flux,havardh/fagdag-itera-photobooth,continuata/react-seed