fix: bump typescript and fix errors

index.ts

@@ -8,15 +8,15 @@
 import { normalizeURL } from "./lib/utils";
 import { merge } from "./lib/merge";
 
 export type DefaultGretchResponse = any;
 export type DefaultGretchError = any;
 
 export type MergeableObject =
   | {
       [k: string]: MergeableObject;
     }
   | Partial<GretchOptions>
   | any[];
 
 export type GretchResponse<T = DefaultGretchResponse, A = DefaultGretchError> =
   | {
@@ -47,13 +47,13 @@
 
 export type GretchOptions = {
   baseURL?: string;
   json?: { [key: string]: any };
   retry?: RetryOptions | boolean;
   timeout?: number;
   onException?: (e: Error) => void;
   hooks?: GretchHooks;
   headers?: { [key: string]: any } & RequestInit["headers"];
   [key: string]: any;
 } & RequestInit;
 
 export type GretchInstance<T, A> = {
@@ -84,7 +84,7 @@
     ...(rest as RequestInit),
   };
   const controller =
-    typeof AbortController !== "undefined" ? new AbortController() : null;
+    typeof AbortController !== "undefined" ? new AbortController() : undefined;
 
   if (controller) {
     options.signal = controller.signal;
@@ -104,7 +104,9 @@
   const request = new Request(normalizedURL, options);
 
   if (hooks.before)
-    [].concat(hooks.before).forEach((hook) => hook(request, opts));
+    ([] as GretchBeforeHook[])
+      .concat(hooks.before)
+      .forEach((hook) => hook(request, opts));
 
   const fetcher = () =>
     timeout
@@ -148,7 +150,7 @@
           error = (resolved || new HTTPError(response)) as A;
         }
       } catch (e) {
         error = (e || `You tried to make fetch happen, but it didn't.`) as any;
       }
 
       const res: GretchResponse<T, A> = {
@@ -160,7 +162,9 @@
       };
 
       if (hooks.after)
-        [].concat(hooks.after).forEach((hook) => hook({ ...res }, opts));
+        ([] as GretchAfterHook[])
+          .concat(hooks.after)
+          .forEach((hook) => hook({ ...res }, opts));
 
       return res;
     };

lib/handleRetry.ts

@@ -1,10 +1,10 @@
 import { HTTPTimeout } from "./errors";
 
 export type RetryOptions = {
-  attempts?: number;
-  codes?: number[];
-  methods?: string[];
-  delay?: number;
+  attempts: number;
+  codes: number[];
+  methods: string[];
+  delay: number;
 };
 
 export const defaultRetryOptions: RetryOptions = {