Revert mixin version

Author: jadeydi

go.mod

@@ -5,7 +5,7 @@ go 1.15
 require (
 	filippo.io/edwards25519 v1.0.0
 	github.com/MixinNetwork/go-number v0.0.0-20210302140654-71a9f2b7e10d
-	github.com/MixinNetwork/mixin v0.13.11
+	github.com/MixinNetwork/mixin v0.13.10
 	github.com/btcsuite/btcutil v1.0.3-0.20210527170813-e2ba6805a890 // indirect
 	github.com/gofrs/uuid v4.2.0+incompatible
 	github.com/google/go-cmp v0.5.6 // indirect