update activeorderbook callback file

pkg/bbgo/activeorderbook_callbacks.go

@@ -0,0 +1,17 @@
+// Code generated by "callbackgen -type ActiveOrderBook"; DO NOT EDIT.
+
+package bbgo
+
+import (
+	"github.com/c9s/bbgo/pkg/types"
+)
+
+func (b *ActiveOrderBook) OnFilled(cb func(o types.Order)) {
+	b.filledCallbacks = append(b.filledCallbacks, cb)
+}
+
+func (b *ActiveOrderBook) EmitFilled(o types.Order) {
+	for _, cb := range b.filledCallbacks {
+		cb(o)
+	}
+}