scripts: add test for compare-dumps script

scripts/compare-dumps_test.go

@@ -0,0 +1,13 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neo-go/pkg/core/native"
+	"github.com/stretchr/testify/require"
+)
+
+func TestCompatibility(t *testing.T) {
+	cs := native.NewContracts(false, map[string][]uint32{})
+	require.Equal(t, cs.Ledger.ID, int32(ledgerContractID))
+}