Update useDeployedContractInfo and useScaffoldEventHistory with deployedOnBlock (#130)

Author: damianmarti

docs/hooks/useDeployedContractInfo.md

@@ -21,4 +21,4 @@ This example retrieves the details of the deployed contract with the specified n
 
 ### Return Value
 
-- `data`: Object containing `address` and `abi` of contract.
+- `data`: Object containing `address`, `abi` and `deployedOnBlock` of the contract.

docs/hooks/useScaffoldEventHistory.md

@@ -31,8 +31,8 @@ This example retrieves the historical event logs for the `GreetingChange` event
 | :----------------------------- | :-------- | :-------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
 | **contractName**               | `string`  | Name of the contract to read from.                                                                                                                                    |
 | **eventName**                  | `string`  | Name of the event to read.                                                                                                                                            |
-| **fromBlock**                  | `bigint`  | Block number from which to start reading events.                                                                                                                      |
-| **toBlock**                    | `bigint`  | block number to stop reading events at (if not provided, reads until current block)                                                                                   |
+| **fromBlock** (optional)       | `bigint`  | Block number from which to start reading events (defaults to `deployedOnBlock` in deployedContracts.ts if set for contract, otherwise defaults to 0).                 |
+| **toBlock** (optional)         | `bigint`  | Block number to stop reading events at (if not provided, reads until current block).                                                                                  |
 | **filters** (optional)         | `object`  | Apply filters to the event based on **indexed** parameter names and values `{ [parameterName]: value }`.                                                              |
 | **blockData** (optional)       | `boolean` | If set to true it will return the block data for each event (default: false).                                                                                         |
 | **transactionData** (optional) | `boolean` | If set to true it will return the transaction data for each event (default: false).                                                                                   |