Update creative.js

[AntoineJac]

2 small fix:
1- append scripts after all html node are append
2- add small regex in case the string is malformed

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: '<bidder name>',
  params: {
    // ...
  }
}

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

• contact email of the adapter’s maintainer
• 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 https://github.com/prebid/prebid.github.io/

Other information

[bretg]

@mkendall07 - since you're working on the AMP-RTC creative, thought it made sense for you to take a look at this small PR.

[bretg]

@AntoineJac - this PR might need to be rebased to pass CI. See #2042

[mkendall07]

yeah thanks Bret. The rebase is on me.

[mkendall07]

@AntoineJac , @bretg
this change is going here: https://github.com/prebid/prebid-universal-creative/blob/master/src/creative.js

Closing this PR