fix(test): handle scenario test rejection (#473)

in newer versions of node, the promise
will never resolve if errors aren't
specifically handled. This can cause
tests to hang indefinitely.

Fixes N/A

test/integration/scenarios/basic-setup/basic-setup.test.js

@@ -40,6 +40,7 @@ describe('A basic karma-webpack setup', () => {
       .then((res) => {
         scenario = res;
       })
+      .catch((err) => console.error('Integration Scenario Failed: ', err))
       .finally(() => done());
   }, KARMA_SERVER_TIMEOUT);