refactor: set name property to readonly

Signed-off-by: w01fgang <sumin@unix-center.ru>

Author: w01fgang

src/__tests__/Try.test.ts

@@ -36,7 +36,7 @@ async function successfulFunction(
 }
 
 class TestClass {
-  private name: string;
+  private readonly name: string;
 
   constructor(name: string) {
     this.name = name;