Updated Config.json to update Websocket

@steemdev recently written a post that a new public jussi endpoint is available and they are going to use it for future which is available at https://api.steemit.com. They have also asked all the third-party applications to use api.steemit.com instead of steemd.steemit.com.

I am using Steem npm package, for that, we have a config.json file in https://github.com/steemit/steem-js. So if we need to change from steemd.steemit.com to api.steemit.com, I need to update the Config.json file.

I have created a branch called codingdefined-patch-1 after forking the original repository and updated the config.json.

Previous Config.json was

{
  "transport": "ws",
  "websocket": "wss://steemd.steemit.com",
  "websocketdev": "wss://steemd.steemitdev.com",
  "uri": "https://steemd.steemit.com",
  "url": "",
  "dev_uri": "https://steemd.steemitdev.com",
  "stage_uri": "https://steemd.steemitstage.com",
  "address_prefix": "STM",
  "chain_id": "0000000000000000000000000000000000000000000000000000000000000000"
}

And it is changed to

{
  "transport": "ws",
  "websocket": "https://api.steemit.com",
  "websocketdev": "wss://steemd.steemitdev.com",
  "uri": "https://api.steemit.com",
  "url": "",
  "dev_uri": "https://steemd.steemitdev.com",
  "stage_uri": "https://steemd.steemitstage.com",
  "address_prefix": "STM",
  "chain_id": "0000000000000000000000000000000000000000000000000000000000000000"
}

If you do not want to change the configuration by not changing the config, then you can set the configuration directly using the below code.

steem.config.set('url', 'https://api.steemit.com')