[REFACTOR] ESLint manual fixes: error 'map' will use Object's default stringification format ('[object Object]') when stringified @typescript-eslint/no-base-to-string

Author: Gonzalo Diaz

src/hackerrank/implementation/migratoryBirds.ts

@@ -30,7 +30,7 @@ export function migratoryBirds(arr: number[]): number {
       max = bird;
   }
 
-  console.debug(`map: ${map.toString()}`);
+  console.debug(`map: ${JSON.stringify(map)}`);
 
   return max;
 }