Added card creation

#17

src/models/responses/ResponseRunnerCard.ts

@@ -17,7 +17,7 @@ export class ResponseRunnerCard {
      * This is important to link scans to runners.
      */
     @IsObject()
-    runner: ResponseRunner;
+    runner: ResponseRunner | null;
 
     /**
      * The card's code.
@@ -40,7 +40,8 @@ export class ResponseRunnerCard {
      */
     public constructor(card: RunnerCard) {
         this.id = card.id;
-        this.runner = card.runner.toResponse() || null;
+        if (!card.runner) { this.runner = null }
+        else { this.runner = card.runner.toResponse(); }
         this.code = card.code;
         this.enabled = card.enabled;
     }