Updated a bunch of optional collumns to be nullable

ref #11 #13

src/models/Address.ts

@@ -25,7 +25,7 @@ export class Address {
   /**
    * The address's description.
    */
-  @Column()
+  @Column({nullable: true})
   @IsString()
   @IsOptional()
   description?: string;
@@ -43,7 +43,7 @@ export class Address {
    * The address's second line.
    * Containing optional information.
    */
-  @Column()
+  @Column({nullable: true})
   @IsString()
   @IsOptional()
   address2?: string;