script/build not running on TypeScript 4.9.3

[makermelissa]

See error log from #44. It seems to be related to using TypeScript 4.9.

Error: node_modules/@types/node/globals.d.ts(341,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'AbortSignal' must be of type '{ new (): AbortSignal; prototype: AbortSignal; abort(reason?: any): AbortSignal; timeout(milliseconds: number): AbortSignal; }', but here has type '{ new (): AbortSignal; prototype: AbortSignal; }'.
Error: Process completed with exit code 2.

According to microsoft/TypeScript#51567, a little housekeeping may be all that is required.

[makermelissa]

Fixed via #56.