Update haskell (#56)
Update haskell (#56)

Included a main module in the haskell source file #56

chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld,chinmayshah99/helloworld