add question 709

Author: rishabh1403

701-800/709-to-lower-case.js

@@ -1,3 +1,10 @@
+/*
+Author :- Rishabh Jain <contact@rishabh1403.com>
+Solution for :- https://leetcode.com/problems/to-lower-case/
+blog for this code :- https://rishabh1403.com/posts/coding/leetcode/2020/03/leetcode-to-lower-case
+youtube video :- https://youtu.be/jFi7-YgIXJQ
+*/
+
 
 const isUpperCase = char => {
   let ascii = char.charCodeAt(0);

README.md

@@ -28,6 +28,8 @@ Solutions of all the questions from Leetcode in JavaScript.
 
 - 268.Missing Number - [Question](https://leetcode.com/problems/missing-number/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/201-300/268-missing-number.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/03/leetcode-missing-number) | [Youtube Video](https://youtu.be/I6AUMvi13fc)
 
+- 709.To Lower Case - [Question](https://leetcode.com/problems/to-lower-case/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/701-800/709-to-lower-case.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/03/leetcode-to-lower-case) | [Youtube Video](https://youtu.be/jFi7-YgIXJQ)
+
 - 771.Jewels and Stones - [Question](https://leetcode.com/problems/jewels-and-stones/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/701-800/771-jewels-and-stones.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/03/leetcode-jewels-and-stones) | [Youtube Video](https://youtu.be/cNVJZF5UT1w)
 
 - 1108.Defanging an IP Address - [Question](https://leetcode.com/problems/defanging-an-ip-address/) | [Source Code](https://github.com/rishabh1403/leetcode-javascript-solutions/blob/master/1101-1200/1108-defang-ip-address.js) | [Blog](https://rishabh1403.com/posts/coding/leetcode/2020/03/leetcode-defang-ip-address) | [Youtube Video](https://youtu.be/s_CepLCQHNY)