fix: Support multiple instance by adding instance id (#58)

* Add instanceId

* Remove uuid

* Fix PR

* fix: bump version

* Prepare release

Author: jia-guo

README.md

@@ -24,7 +24,7 @@ npm install @smartcar/auth
 ### Smartcar CDN
 
 ```html
-<script src="https://javascript-sdk.smartcar.com/2.7.0/sdk.js"></script>
+<script src="https://javascript-sdk.smartcar.com/2.7.1/sdk.js"></script>
 ```
 
 ## SDK reference
@@ -178,4 +178,4 @@ https://application-backend.com/page?error=access_denied&error_description=User+
 [tag-image]: https://img.shields.io/github/tag/smartcar/javascript-sdk.svg
 
 <!-- Please do not modify or remove this, it is used by the build process -->
-[version]: 2.7.0
+[version]: 2.7.1