[new feature] add Notify component (#2135)

types/notify.d.ts

@@ -0,0 +1,32 @@
+import Vue from 'vue';
+
+type NotifyMessage = string | number;
+
+export type NotifyOptions = {
+  message?: NotifyMessage;
+  color?: string;
+  background?: string;
+  duration?: number;
+}
+
+export interface VanNotify extends Vue {
+  message: NotifyMessage;
+  color: string;
+  background: string;
+  duration: number;
+}
+
+export interface Notify {
+  (message: NotifyOptions | NotifyMessage): VanNotify;
+  clear(): void;
+  setDefaultOptions(options: NotifyOptions): void;
+  resetDefaultOptions(): void;
+}
+
+declare module 'vue/types/vue' {
+  interface Vue {
+    $notify: Notify
+  }
+}
+
+export const Notify: Notify;