[CORL-305] Speed up build process and upgrade dependencies (#2304)

* feat: speed up build process, upgrade majority of dependencies

* feat: allow specifying max cores

* chore: add some comments

scripts/watcher/types/pstree.remy.d.ts

@@ -1,6 +1,6 @@
 declare module "pstree.remy" {
   export default function psTree(
     pid: number,
-    callback: (err: Error, kids: Array<{ PID: number }>) => void
+    callback: (err: Error, kids: string[]) => void
   ): void;
 }