Mark Robson roppa

## tez
I am attesting that this GitHub handle roppa is linked to the Tezos account tz1iC7UNquWbwf24kW3sGdVtYCNE5EzmTSkT for tzprofiles

## crypto.go
package crypto

import (
	"crypto/sha256"
)

// NewSHA256 ...
func NewSHA256(data []byte) []byte {
	hash := sha256.Sum256(data)
	return hash[:]
	package crypto

	import (
	"crypto/sha256"
	)

	// NewSHA256 ...
	func NewSHA256(data []byte) []byte {
	hash := sha256.Sum256(data)
	return hash[:]