integrity using scopes

Setting an integrity to true on a scope will set the integrity for any resource not found in the manifest to true.

Setting an integrity to null on a scope will set the integrity for any resource not found in the manifest to fail matching.

Not including an integrity is the same as setting the integrity to null.

"cascade" for integrity checks will be ignored if "integrity" is explicitly set.

The following example allows loading any file:

{
  "scopes": {
    "file:": {
      "integrity": true
    }
  }
}