Add nonce also for preloaded scripts

[jukben]

Description

At @productboard we plan to use this plugin (thanks for that!). We use script preloads to optimize loading experience. I propose that nonces should be also added on those.

<link rel="preload" href="..." as="script" crossorigin="anonymous">

What type of issue is this? (place an x in one of the [ ])

• bug
• enhancement (feature request)
• question
• documentation related
• testing related
• discussion

Requirements (place an x in each of the [ ])

• I've read and understood the Contributing guidelines and have done my best effort to follow them.
• I've read and agree to the Code of Conduct.
• I've searched for any related issues and avoided creating a duplicate issue.