title: how to make my xl converted text in all lowercase and trimed in nodejs?
body: <p>I tried on converting my xl to json. Conversion is happening well, but though I have written code for conversion to lowercase and trim, its not happening. I am getting the output as below.. but I am expecting the output all in lowercase and trimmed..can someone help </p>
  
  <pre><code>   var exceltojson = require("xlsx-to-json");
            exceltojson(
                {
              input: "test.xlsx",
              output: 'test.txt', 
              sheet: "Sheet1",  
  
            }, function(err, result) 
            {
              if(err) 
              {
                console.error(err);
              }
            });
  </code></pre>
  
  <p>output:</p>
  
  <pre><code>[
    {
      Email: 'abc@123.com',
      'First Name': 'a',
      'Middle Name': 'b',
      'Last Name': 'c',
      'Address 1': 'd',
      'Address 2': 'lol',
      'Phone No': '123456789'
    },
    {
      Email: 'a@123.com',
      'First Name': 'g',
      'Middle Name': 'h',
      'Last Name': 'i',
      'Address 1': 'j',
      'Address 2': 'lol',
      'Phone No': '458745'
    }
  ]
  </code></pre>
  
  <p>I expect output like</p>
  
  <pre><code>[
    {
      email: 'abc@123.com',
      firstname: 'a',
      middlename: 'b',
      lastname: 'c',
      'address 1': 'd',
      'address 2': 'lol',
      phoneno: '123456789',
    },
    {
      email: 'a@123.com',
      firstname: 'g',
      middlename: 'h',
      lastname: 'i',
      address1: 'j',
      'address 2': 'lol',
      phoneno: '458745',
    },
  ];
  </code></pre>