Merge pull request #244 from Kiikurage/improve-type

TypeScript: Improve type definition to use optional chaining

Author: ryanbrainard

src/index.d.ts

@@ -47,19 +47,23 @@ export interface PendingPromiseState<T = {}> extends PromiseStateBase {
   readonly pending: true;
   readonly fulfilled: false;
   readonly rejected: false;
+  readonly value: undefined;
+  readonly reason: undefined;
 }
 
 export interface FulfilledPromiseState<T = {}> extends PromiseStateBase {
   readonly pending: false;
   readonly fulfilled: true;
   readonly rejected: false;
   readonly value: T;
+  readonly reason: undefined;
 }
 
 export interface RejectedPromiseState<T = {}> extends PromiseStateBase {
   readonly pending: false;
   readonly fulfilled: false;
   readonly rejected: true;
+  readonly value: undefined;
   readonly reason: any;
 }