Port to AssemblyScript some code for performance

[darky]

On one project, instead of using isPointInPolygon I rewrite some code to Rust and compile it to WebAssembly like this toy project: https://github.com/darky/rstar-wasm

Performance gain 30-200 RPS -> 4700-5100 RPS

Maybe need to rewrite some performance critical parts with https://github.com/AssemblyScript/assemblyscript

You can drastically increase performance of geolib ;)

[manuelbieh]

Interesting. Maybe I will give it a try in v4.