* no_std trie compile in test_runtime (require to set nightly feature due
to the way hashbrown currently works).
* No nightly with hashmap_core.
* using crate elastic-array
* switch to publish trie crates
* fix default array decl
* bump impl_version for ci
* set all semver when possible wasm, and remove redundant code.
* Actually test use_trie function
* impl version +1
* Bump impl version
Went through the TODOs, removed a bunch, which are outdated or nothing more than a regular comment, documented a bunch more as actual tickets and made them FIXMEs and unified their structure (`FIXME #TICKETNO DESC` for local tickets, `FIXME: DESC LINK` for external tickets) for easier in-editor support. Further more remove unnecessary remarks and related old code that I noticed in that instance.
cheme