Add AdNow bid Adaptor

[vingood]

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

• test parameters for validating bids

{
  bidder: 'adnow',
  params: {
    codeId: 794934
  }
}

Be sure to test the integration with your adserver using the Hello World sample page.

• contact email of the adapter’s maintainer: [email protected]
• official adapter submission

For any changes that affect user-facing APIs or example code documented on http://prebid.org, please provide:

• A link to a PR on the docs repo at Add adnow bidder adaptor doc prebid.github.io#2314

Other information

[ncolletti]

Please include a markdown file, more information on what's expected can be found here.

[vingood]

Your comments were taken into account. I've update the PR.

[patmmccann]

Please remove all your changes to package-lock.json and submit them in a different pr if you still want them.