* Handle BigNumber event params in watchers
* Customize decimal according to limits of IEEE-754 decimal128
* Add definition for custom scalar BigDecimal
* Handle tuple return type in ethereum host API
* Update graph-cli version to fix eth_call error
* Handle all types in struct based on abi
Co-authored-by: prathamesh0 <prathamesh.musale0@gmail.com>
* 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