Add source map loader config for ts/tsx files (as per docs recommendation)
Add source map loader config for ts/tsx files (as per docs recommendation)

bryanbecker/screeps-typescript-starter,Adirelle/typescreeps,Adirelle/typescreeps,boriswintein/Empire,bryanbecker/screeps-typescript-starter,tinnvec/aints,Sean-Brown/screeps-typescript-starter,tinnvec/aints,Sean-Brown/screeps-typescript-starter,KeithHanson/screeps-typescript,KeithHanson/screeps-typescript