test: add timeout to saga take

This will crash tests sooner and give a stack track at the crash point
instead of waiting the default 5 seconds for the entire test to timeout
(which doesn't give a stack trace of where the test was when it timed
out).

test/index.tsx

@@ -51,11 +51,14 @@ export class AsyncSaga {
             // if there are no dispatches queued, then queue the taker to be
             // completed later
             return new Promise((resolve, reject) => {
+                const timeout = setTimeout(reject, 500, new Error('timed out'));
+
                 this.takers.push({
                     put: (a: AnyAction): void => {
                         if (a.type === END.type) {
                             reject();
                         } else {
+                            clearTimeout(timeout);
                             resolve(a);
                         }
                     },