* Test case for wasm out of memory error
* Restart wasm instance after N blocks
* Handle out of memory error and re instantiate WASM
* Remove old instance from map before reinstantiating WASM
* Handle relation entities in subgraph
* Modify eden-watcher entities to handle subgraph schema data types
* Modify schema gql to match eden subgraph gql shape
* Handle array type fields in subgraph schema
* Fix store get api for array type fields in subgraph entities
* Handle array type in eden-watcher and format await used in params
* Invoke subgraph handler in watcher event processing
* Fix error when invoking subgraph handler
* Parse events using event signature specified in subgraph yaml
* Use contract abi to parse event params
* Invoke event handler based on event signature
* Fill event with block and transaction data
* Comment missing fields in block and transaction data
* Invoke handlers based on watcher-ts events
* Read subgraph yaml and listen to events from watcher-ts
* Create GraphWatcher class to use in generated example contract watcher
* Call graph-node event handler from generated watcher
