feat: replace null with undefined (#41)

BREAKING CHANGE: Return `undefined` instead of `null` for default value to allow reassignment when destructuring

src/index.ts

@@ -1,11 +1,11 @@
-export type NoTryResult<T, E = Error> = [E | null, T | null];
+export type NoTryResult<T, E = Error> = [E | undefined, T | undefined];
 
 function noop(): void {
-  return null;
+  return undefined;
 }
 
 export function noTry<T, E = Error>(fn: () => T, handleErr: (error: E) => void = noop): NoTryResult<T, E> {
-  const result: NoTryResult<T, E> = [null, null];
+  const result: NoTryResult<T, E> = [undefined, undefined];
   try {
     result[1] = fn();
   } catch (err) {
@@ -19,7 +19,7 @@ export async function noTryAsync<T, E = Error>(
   fn: () => Promise<T>,
   handleErr: (error: E) => void = noop,
 ): Promise<NoTryResult<T, E>> {
-  const result: NoTryResult<T, E> = [null, null];
+  const result: NoTryResult<T, E> = [undefined, undefined];
   try {
     result[1] = await fn();
   } catch (err) {