Update stuff

lib/redis.js

@@ -44,15 +44,15 @@ const wrapped = new Promise((resolve, reject) =>
 );
 
 export function sessionStore() {
-  return function* sessionStoreMiddleware(next) {
-    const sess = yield redisSession;
-    yield sess.bind(this)(next);
+  return async (ctx, next) => {
+    const sess = await redisSession;
+    await sess.bind(ctx)(next());
   };
 }
 
 export function middleware() {
-  return function* redisMiddleware(next) {
-    this.redis = yield wrapped;
-    yield next;
+  return async (ctx, next) => {
+    ctx.redis = await wrapped;
+    await next();
   };
 }