Update README.md

Signed-off-by: GiauPhan <122676967+giauphan@users.noreply.github.com>

Author: giauphan

README.md

@@ -9,7 +9,7 @@
  Install using **composer**:
 
  ```bash
-composer require giauphan/laravel-qr-code
+composer require giauphan/laravel-qr-code:v1.0.2
  ```
 ##### Laravel 5.4 (5.5+ can skip this step)