Lints some errors and warnings (#76)

src/state/models/feed-view.ts

@@ -426,7 +426,7 @@ export class FeedModel {
     }
     this._xLoading()
     let numToFetch = this.feed.length
-    let cursor = undefined
+    let cursor
     try {
       do {
         const res: GetTimeline.Response = await this._getFeed({

src/state/models/notifications-view.ts

@@ -366,7 +366,7 @@ export class NotificationsViewModel {
     }
     this._xLoading()
     let numToFetch = this.notifications.length
-    let cursor = undefined
+    let cursor
     try {
       do {
         const res: ListNotifications.Response =

src/state/models/onboard.ts

@@ -50,7 +50,9 @@ export class OnboardModel {
   }
 
   next() {
-    if (!this.isOnboarding) return
+    if (!this.isOnboarding) {
+      return
+    }
     let i = OnboardStageOrder.indexOf(this.stage)
     i++
     if (i >= OnboardStageOrder.length) {