Update lib/index.d.ts

Co-authored-by: Enric Bisbe Gil <[email protected]>

Author: zirkelc

lib/index.d.ts

@@ -12,7 +12,7 @@ declare module '@serverless/typescript' {
 type StateMachines = {
   [stateMachine: string]: {
     id?: string;
-    name: string;
+    name?: string;
     definition: Definition;
     tracingConfig?: TracingConfig;
   };