Since tdewolff/minify supports SVG minimization, let's make use of it. As we
need to keep the license in the SVG because we're nice netizens, we can at
least use SPDX identifiers instead of using it verbatim.
This does save a couple of kB.
- Use a simple struct instead of two slices to store the data and the checksums
of resources
- Remove a superfluous call to Sprintf
- Factorise presence check and data retrieval in some maps
- Size the maps when possible
- The JS bundle has its own isolated scope
- There is no need to use IIFEs anymore (Immediately Invoked Function Expressions)
- Modules are executed after the HTML document is fully parsed, similar to `defer` attribute
- There is no need to use `DOMContentLoaded` anymore
- Module scripts inherently run in strict mode (no need to define `use strict` anymore)
This commit adds a policy, and make use of it in the Content-Security-Policy.
I've tested it the best I could, both on a modern browser supporting
trusted-types (Chrome) and on one that doesn't (firefox).
Thanks to @lweichselbaum for giving me a hand to wrap this up!
