This commit enables new `beforeDeploy` deployment hooks. With this change
it's possible to add `beforeDeploy` to either `contracts: {}` within the contracts
configuration, or an individual contract.
For example:
```
contracts: {
SimpleStorage: {
beforeDeploy: async (context) => {
}
}
}
```
Runs the hook before `SimpleStorage` will be deployed. Whereas
```
contracts: {
...
beforeDeploy: async () => {
}
}
will be executed before *all* Smart Contracts will be deployed.
This will allow users to generated deploy hook specific output using the supplied `logger` within deployment hooks.
The logger will generate an output a la:
```
ContractName > deploymentHook > Output
```
and
```
afterDeploy > Output
```
respectively.
E.g. an `onDeploy` hook config like this:
```
contracts: {
SimpleStorage: {
fromIndex: 0,
args: [100],
onDeploy: (context) => {
context.logger.log('Hello from on deploy');
}
}
}
```
Will output:
```
SimpleStorage > onDeploy > Hello from on deploy
```