v0.3.0 — playtest fixes, two new rules, and §7 enforced

test/harness.test.ts

@@ -212,7 +212,7 @@ describe('the game conserves Rolling Stock', () => {
           const f = card.facility;
           if (!f) continue;
           n += f.industryTrack.cars.length + f.outboundBox.length + f.inboundBox.length;
-          n += f.menAtWork.filter((m) => m !== null).length;
+          n += (f.menAtWork ?? []).filter((m) => m !== null).length;
         }
       }
       return n;