Silence the deployer ethers provider

[bbenligiray]

Deployer sometimes outputs this to the terminal

========= NOTICE =========
Request-Rate Exceeded  (this message will not be repeated)

The default API keys for each service are provided as a highly-throttled,
community resource for low-traffic projects and early prototyping.

While your application will continue to function, we highly recommended
signing up for your own API keys to improve performance, increase your
request rate/limit and enable other perks, such as metrics and advanced APIs.

For more details: https://docs.ethers.io/api-keys/
==========================

The default provider needs to be overriden to silence this message:
ethers-io/ethers.js#1036

[bbenligiray]

Turning off all logs doesn't work
ethers-io/ethers.js#379

[ricmoo]

There is probably no need to override anything. Simply make sure you pass in your own keys. Or if you do sub-class it, return your own default keys to the static getApiKey method. :)

[bbenligiray]

@ricmoo Thanks for dropping by :)

This is a sort of a special case where the user doesn't know what an Ethereum provider is, doesn't have an API key to insert and will be running this only once (in a while).

We want to be more chain-agnostic anyway so I think we will move away from using the default ethers provider.

[bbenligiray]

We're now using the provider URL from config.json
27f22f3#diff-5663c2c90283b2e61f87d95800ccea766b06ceb858857e46acdb5e48840b6ea8R21