Invamia Bid Adapter: add new bid adapter

[llays]

Type of change

• Bugfix
• Feature
• New bidder adapter
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• CI related changes
• Does this change affect user-facing APIs or examples documented on http://prebid.org?
• Other

Description of change

• test parameters for validating bids

{
  bidder: 'invamia',
  params: {
    zoneId: 379783,
  }
}

• contact email of the adapter’s maintainer: contact@invamia.com
• official adapter submission
• docs PR: Invamia Bid Adapter: added dev docs for invamia bid adapter prebid.github.io#3009

[FilipStamenkovic]

@llays One thing I forgot to check in your adapter is adomain, now I see your adapter doesn't support it. You can read more about it in this issue: #5966 .

Can you please open new PR to add support?