Utilium

A bunch of utilities for Typescript. This includes:

- Compile-time math types
- Debugging types and functions
- Utilities for using fetch with HTTP range requests
- Extending buffers easier with extendBuffer
- Convenience types and functions for strings and objects
- RNG functions
- Ranged cache
- List, a class that combines the best aspects of Set and arrays
- JSONFileMap and FolderMap
- Version utilities
- Xterm.js shell handling (arrows, home/end, prompting, etc.)