Appease linter

src/Line.ts

@@ -21,7 +21,7 @@ export default class Line {
     start: PIXI.Point,
     startDirection: Direction,
     numStations: number,
-    color: tinycolorInstance
+    color: tinycolorInstance,
   ) {
     this.color = color;
     this.stations = [];

src/Train.ts

@@ -21,7 +21,7 @@ export default class Train {
     passengers: number,
     origin: Station,
     destination: Station,
-    color: tinycolorInstance
+    color: tinycolorInstance,
   ) {
     this.location = location;
     this.speed = speed;