simple-cipher: Add canonical-data.json (#1241)
simple-cipher: Add canonical-data.json (#1241)

* Add simple-cipher canonical-data
rpottsoh/x-common,ErikSchierboom/x-common,jmluy/x-common,petertseng/x-common,jmluy/x-common,rpottsoh/x-common,ErikSchierboom/x-common,exercism/x-common,jmluy/x-common,exercism/x-common,petertseng/x-common