chore: general cleanup and feature hygiene

offline-web-storage/src/lib.rs

@@ -23,7 +23,6 @@ impl From<idb::Error> for StoreError {
     }
 }
 
-#[cfg(feature="wasm")]
 impl From<serde_json::Error> for StoreError {
     fn from(value: serde_json::Error) -> Self {
         StoreError::SerializationError(Box::new(value))
@@ -55,4 +54,5 @@ mod indexeddb;
 #[cfg(feature="wasm")]
 pub use indexeddb::IndexedDbReferenceStore;
 
+#[cfg(test)]
 mod integration_tests;