fix(types): update this for nextTick api (vuejs#9541)

Author: Gcaufy

types/test/vue-test.ts

@@ -86,6 +86,9 @@ class Test extends Vue {
       }
     });
     this.nextTick(() => {});
+    this.nextTick(function () {
+      console.log(this.text === 'test');
+    }, { text: 'test'});
     this.nextTick().then(() => {});
     this.set({}, "", "");
     this.set({}, 1, "");

types/vue.d.ts

@@ -89,7 +89,7 @@ export interface VueConstructor<V extends Vue = Vue> {
   extend<Props>(definition: FunctionalComponentOptions<Props, RecordPropsDefinition<Props>>): ExtendedVue<V, {}, {}, {}, Props>;
   extend(options?: ComponentOptions<V>): ExtendedVue<V, {}, {}, {}, {}>;
 
-  nextTick(callback: () => void, context?: any[]): void;
+  nextTick<T>(callback: (this: T) => void, context?: T): void;
   nextTick(): Promise<void>
   set<T>(object: object, key: string | number, value: T): T;
   set<T>(array: T[], key: number, value: T): T;