title: How to rename object keys inside array
body: <p>I have an array of objects like this:</p>
  <pre><code>const customers = [
    {
      customer_name: 'Negan', 
      customer_age: 45, 
      customer_weapon: 'Bat',
      customer_email: 'negan@sanctuary.com',
      customer_city: 'Washington' 
    },
    {
      customer_name: 'Daryl', 
      customer_age: 41, 
      customer_weapon: 'Crossbow',
      customer_email: 'daryl.dixon@kickass.com',
      customer_city: 'Atlanta' 
    },
    {
      customer_name: 'Rick', 
      customer_age: 45, 
      customer_weapon: 'Magnum 357',
      customer_email: 'rick@alexandria.com',
      customer_city: 'King County' 
    },
  ]
  </code></pre>
  <p>and I want to replace all keys inside objects with these keys:</p>
  <pre><code>const newKeys = [
     'firstname',
     'age',
     'weapon',
     'email',
     'city'
  ]
  </code></pre>
  <p>What is the best way to do this? An example will be appreciated!</p>