Bumps elint ecma version

Removes strict-boolean-expressions because its too noisy

Avoids unneeded `void`s to know if return value is intentionally discarded
Uses `type` imports when possible (avoids unneeded bundling)

Adds unit testing (just for the trie for now)

Moves eslint ignores into rc file
 Removes unused dev dependency

Adds anti-trojan-source eslint rule
Improves typescript config for eslint import

Giving up on better else/catch/finally formatting -- can't fight anymore
Switching to tabs for better accessibility
https://twitter.com/sh4na/status/1146837957200027648