Fixed import

ref #11

src/models/Scan.ts

@@ -1,5 +1,6 @@
 import { PrimaryGeneratedColumn, Column, ManyToOne } from "typeorm";
 import {
+  IsBoolean,
   IsInt,
   IsNotEmpty,
   IsOptional,
@@ -38,6 +39,6 @@ export abstract class Scan {
    * Is the scan valid (for fraud reasons).
    */
   @Column()
-  @Boolean()
+  @IsBoolean()
   valid = true;
 }