CodeWars: add a new property

CodeWars: add a new property.txt

ASSIGNMENT
______________________________
You will be given an array of objects (associative arrays in PHP) representing data about developers 
who have signed up to attend the next coding meetup that you are organising.
Your task is to return an array where each object will have a new property 'greeting' with the following string value:
Hi < firstName here >, what do you like the most about < language here >?

SOLUTION
______________________________
function greetDevelopers(list) {
  // thank you for checking out my kata :)
  list.map((obj) => obj.greeting = `Hi ${obj.firstName}, what do you like the most about ${obj.language}?`);
  return list;
}
greetDevelopers([
  { firstName: 'Sofia', lastName: 'I.', country: 'Argentina', continent: 'Americas', age: 35, language: 'Java' },
  { firstName: 'Lukas', lastName: 'X.', country: 'Croatia', continent: 'Europe', age: 35, language: 'Python' },
  { firstName: 'Madison', lastName: 'U.', country: 'United States', continent: 'Americas', age: 32, language: 'Ruby' } 
])