Pass the official `toml-test` suite

[kt3k]

https://github.com/toml-lang/toml-test

https://toml-lang.github.io/toml-test-matrix/output/js-deno-toml.html

There are 30 failures in decoder (parser) tests, 89 failures in encoder (stringify) tests, and 109 failures in invalid input handling.

[iuioiua]

We should download the test files from https://github.com/toml-lang/toml-test and test them with Deno.test. A const ignore: string[] can be created that acts a todo list for tests that are yet to pass.

[cosmastech]

Is there a way to get the toml-test suite re-run officially? Would be nice to be able to monitor how much has already been chewed through.

I realize I can run it locally, but I am very lazy 😝