fix: use next major version for generator

.releaserc.json

@@ -27,7 +27,7 @@
     [
       "@semantic-release/exec",
       {
-        "prepareCmd": "sed -i 's/^version: .*$/version: ${nextRelease.version}/' pubspec.yaml && sed -i 's/^  fluorflow: .*$/  fluorflow: ${nextRelease.version}/' pubspec.yaml",
+        "prepareCmd": "sed -i 's/^version: .*$/version: ${nextRelease.version}/' pubspec.yaml && sed -i 's/^  fluorflow: .*$/  fluorflow: ^${nextRelease.version}/' pubspec.yaml",
         "publishCmd": "dart pub publish -f",
         "execCwd": "packages/fluorflow_generator"
       }