feat: 🏷️ update IsArray to extend upon readonly arrays

index.ts

@@ -16,7 +16,7 @@ export type Assignable<Actual, Assigned extends Actual> = Assigned extends Actua
 
 export type Extends<Actual, Extension> = Extension extends Actual ? true : false
 
-export type IsArray<Actual> = Actual extends any[] ? true : false
+export type IsArray<Actual> = Actual extends readonly any[] ? true : false
 
 export type IsNonArray<Actual> = IsArray<Actual> extends true ? false : true