ignore JSON and Cadence test files

Author: turbolent

lib/go/contracts/contracts.go

@@ -1,6 +1,6 @@
 package contracts
 
-//go:generate go run github.com/kevinburke/go-bindata/go-bindata -prefix ../../../contracts -o internal/assets/assets.go -pkg assets -nometadata -nomemcopy ../../../contracts/...
+//go:generate go run github.com/kevinburke/go-bindata/go-bindata -ignore=.*_test\.cdc -ignore=.*.json -prefix ../../../contracts -o internal/assets/assets.go -pkg assets -nometadata -nomemcopy ../../../contracts/...
 
 import (
 	"fmt"