fix

lib/interfaces/Serializable.ts

@@ -1,7 +1,3 @@
-export abstract class Serializable {
-  public abstract serialize(): string;
-  // eslint-disable-next-line @typescript-eslint/no-unused-vars
-  public static deserialize (str: string): Serializable {
-    throw new Error ('not implemented');
-  }
+export interface Serializable {
+  serialize(): string;
 }