use stdlib "slices".

examples/basic-elasticsearch/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/fiatjaf/khatru"
 	"github.com/fiatjaf/eventstore/elasticsearch"
+	"github.com/fiatjaf/khatru"
 )
 
 func main() {

examples/basic-postgres/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/fiatjaf/khatru"
 	"github.com/fiatjaf/eventstore/postgresql"
+	"github.com/fiatjaf/khatru"
 )
 
 func main() {

examples/basic-sqlite3/main.go

@@ -4,8 +4,8 @@ import (
 	"fmt"
 	"net/http"
 
-	"github.com/fiatjaf/khatru"
 	"github.com/fiatjaf/eventstore/sqlite3"
+	"github.com/fiatjaf/khatru"
 )
 
 func main() {

go.mod

@@ -9,7 +9,6 @@ require (
 	github.com/puzpuzpuz/xsync/v3 v3.0.2
 	github.com/rs/cors v1.7.0
 	github.com/sebest/xff v0.0.0-20210106013422-671bd2870b3a
-	golang.org/x/exp v0.0.0-20231006140011-7918f672742d
 )
 
 require (
@@ -51,6 +50,7 @@ require (
 	github.com/valyala/bytebufferpool v1.0.0 // indirect
 	github.com/valyala/fasthttp v1.51.0 // indirect
 	go.opencensus.io v0.24.0 // indirect
+	golang.org/x/exp v0.0.0-20231006140011-7918f672742d // indirect
 	golang.org/x/net v0.18.0 // indirect
 	golang.org/x/sys v0.14.0 // indirect
 	google.golang.org/protobuf v1.31.0 // indirect

policies/events.go

@@ -3,8 +3,9 @@ package policies
 import (
 	"context"
 
+	"slices"
+
 	"github.com/nbd-wtf/go-nostr"
-	"golang.org/x/exp/slices"
 )
 
 // PreventTooManyIndexableTags returns a function that can be used as a RejectFilter that will reject

policies/filters.go

@@ -3,8 +3,9 @@ package policies
 import (
 	"context"
 
+	"slices"
+
 	"github.com/nbd-wtf/go-nostr"
-	"golang.org/x/exp/slices"
 )
 
 // NoComplexFilters disallows filters with more than 2 tags.

policies/nip04.go

@@ -3,9 +3,10 @@ package policies
 import (
 	"context"
 
+	"slices"
+
 	"github.com/fiatjaf/khatru"
 	"github.com/nbd-wtf/go-nostr"
-	"golang.org/x/exp/slices"
 )
 
 // RejectKind04Snoopers prevents reading NIP-04 messages from people not involved in the conversation.