patched sample 1.2.1 (#8)

* Update SDK version to 1.2.5

Co-authored-by: danney-chun <63285271+danney-chun@users.noreply.github.com>
Co-authored-by: Dongjin Jung <cobb.jung@sendbird.com>
Co-authored-by: Cobb Jung <jungdj@kaist.ac.kr>

Author: 4 people

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "calls-quickstart",
-  "version": "1.2.0",
+  "version": "1.2.1",
   "description": "",
   "main": "app.js",
   "scripts": {
@@ -34,7 +34,7 @@
     "express": "^4.17.1",
     "jss": "^10.0.3",
     "jss-preset-default": "^10.0.3",
-    "sendbird-calls": "^1.2.4",
+    "sendbird-calls": "^1.2.5",
     "uuid": "^3.3.3"
   }
 }