API: Change singularity.applyToCompany() to use an enum for job field (#859)

src/NetscriptFunctions.ts

@@ -20,6 +20,7 @@ import {
   FactionWorkType,
   GymType,
   JobName,
+  JobField,
   LiteratureName,
   LocationName,
   ToastVariant,
@@ -109,6 +110,7 @@ export const enums: NSEnums = {
   FactionWorkType,
   GymType,
   JobName,
+  JobField,
   LocationName,
   ToastVariant,
   UniversityClassType,