webhook_url can't read from config ( Environment ) file.

[rijojoseph57]

I found one issues while using this plugin. I was trying set webhook_url dynamically,
the webhook_url is not fetching the values from the config file , so i debugged the plugin and analysed that the this.webhook_url = this.serverless.service.custom.slack.webhook_url; is reading in the constructor. So before setting up the value the constructor get executes and the webhook_url is not setting the evaluated value from config.

The Solution I found is read the webhook_url from afterDeployFunction and afterDeployService
Add the same ( this.webhook_url = this.serverless.service.custom.slack.webhook_url; ) in this method as well.

Developers please consider this issue when you are updating the new version

[maartenvanvliet]

Could you file a PR?

[rijojoseph57]

I given the PR , please have a look

[rijojoseph57]

Can you have a look on my PR ,

[maartenvanvliet]

closed with #4