chore: Use range of versions for js

Author: mugikhan

packages/powersync/pubspec.yaml

@@ -22,7 +22,7 @@ dependencies:
   logging: ^1.1.1
   collection: ^1.17.0
   fetch_client: ^1.1.2
-  js: ^0.6.7
+  js: ">= 0.6.7 <0.8.0"
   pubspec_parse: ^1.3.0
   args: ^2.5.0
   pub_semver: ^2.1.4