docs(types): [Tryit] label tuple elements

- https://www.typescriptlang.org/docs/handbook/release-notes/typescript-4-0.html#labeled-tuple-elements

Signed-off-by: Lexus Drumgold <[email protected]>

Author: unicornware

src/types/tryit.ts

@@ -13,7 +13,7 @@ import type Fn from './fn'
  */
 type Tryit<T extends Fn, E extends Error = Error> = Fn<
   Parameters<T>,
-  Promise<[E, null] | [null, Awaited<ReturnType<T>>]>
+  Promise<[err: E, result: null] | [err: null, result: Awaited<ReturnType<T>>]>
 >
 
 export type { Tryit as default }