limit the version

Author: Tom-Dynamsoft

1.hello-world/3.read-video-angular/package.json

@@ -19,7 +19,7 @@
         "@angular/platform-browser": "~11.2.5",
         "@angular/platform-browser-dynamic": "~11.2.5",
         "@angular/router": "~11.2.5",
-        "dynamsoft-javascript-barcode": "^8.8.1",
+        "dynamsoft-javascript-barcode": "8.8.1",
         "rxjs": "~6.6.0",
         "tslib": "^2.0.0",
         "zone.js": "~0.11.3"
@@ -43,4 +43,4 @@
         "tslint": "~6.1.0",
         "typescript": "~4.1.5"
     }
-}
+}