feat(line-login): add loginWeb function (#2810)

* add line-login

* Update index.ts

* add params and result type

* Update index.ts

* Update index.ts

* feat(line-login)add method

src/@ionic-native/plugins/line-login/index.ts

@@ -99,6 +99,19 @@ export class LineLogin extends IonicNativePlugin {
     return;
   }
 
+  /**
+   * Login with Web
+   * (iOS only)
+   * @return {Promise<LineLoginProfile>}
+   */
+  @Cordova({
+    successIndex: 1,
+    errorIndex: 2
+  })
+  loginWeb(): Promise<LineLoginProfile> {
+    return;
+  }
+
   /**
    * Logout
    * @return {Promise<any>}