* do not return empty entries from state_queryStorage
* revert back None -> null change
* Revert "revert back None -> null change"
This reverts commit 318eb043e03b7aabbc3f176e02c15fd4595d16db.
* Make test-client generic over runtime.
* Make sure genesis storage is constructed correctly.
* Use prelude in tests.
* Add an example of how to use test-client with node/runtime.
* Bump version.
* Rename test-clients.