message: Add a note about collaborators
diff: [![Build Status for linux](https://travis-ci.org/kulshekhar/ts-jest.svg?branch=master)](https://travis-ci.org/kulshekhar/ts-jest)
  [![Build Status for Windows](https://ci.appveyor.com/api/projects/status/g8tt9qd7usv0tolb/branch/master?svg=true)](https://ci.appveyor.com/project/kulshekhar/ts-jest/branch/master)
  +> Note: Looking for collaborators. [Want to help improve ts-jest?](https://github.com/kulshekhar/ts-jest/issues/223)
  ## Table of Contents
  