v0.1.0: Building & Packaging w/node-pre-gyp (#11)

* Implement deps_build script

* Actually update the submodules on CI

* Added build/ to .gitignore

* updated submodules, added package-lock.json to .gitignore

* Implement node-pre-gyp build

* Rename ts folder to lib

* Various build fixes

* In CI, require `index` so all files are loaded

* Run deps_build.ts as part of the node-gyp build

* pre-join cross-compile-flags, run tsc as part of install

* TURNS OUT BIGINT WAS EXPERIMENTAL THIS WHOLE TIME