- Implement a better/simpler polyfill for web browsers that don't supported
trusted types yet
- Use two separate policies: one to create HTML, another to create/use script
urls
- Instead of having the policy live in the top-level scope, they're now
declared at the lowest possible scope, right before they're used, making them
inaccessible outside of it. This puts their usage completely out of reach of
an attacker unable to gain some control outside of those two (small) scopes,
and thus removes the need to tighten the policies.
- Remove the now-unused tt.js file
This has been tested on Firefox (doesn't support trusted types) and on Chromium
(does support trusted types).
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