message: Add Nishant Mittal to contributors list
diff: @@ -1548,6 +1548,16 @@ How do I track my progress to get an awesome shirt from Hacktoberfest 2018?
  - Just a Noob
  [![github-alt][github-img]](https://github.com/itsnikhil)
  +### Nishant Mittal
  +
  +- I'm a student of software development.
  +- interest in maths,computer science,logical reasoning with tricks.
  +- believes in innovations with new ideas.
  +- i like to play chess also.
  +- i like to do code.
  +- [![github-alt][github-img]](https://github.com/example)
  + [![dribbble-alt][dribbble-img]](https://dribbble.com/example)
  +
  ### Nabheet Madan
  - I'm a SAP Technical Consultant interested in #Technical stuff.
  