Upgrade to Go 1.21

go.mod

@@ -1,13 +1,12 @@
 module github.com/jwilsson/jiphy
 
-go 1.19
+go 1.21
 
 require (
 	github.com/aws/aws-lambda-go v1.34.1
 	github.com/aws/aws-sdk-go-v2/config v1.18.19
 	github.com/jwilsson/go-bot-utils v1.14.1
 	github.com/slack-go/slack v0.11.3
-	golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561
 )
 
 require (

go.sum

@@ -60,8 +60,6 @@ github.com/slack-go/slack v0.11.3/go.mod h1:hlGi5oXA+Gt+yWTPP0plCdRKmjsDxecdHxYQ
 github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
 github.com/stretchr/testify v1.2.2/go.mod h1:a8OnRcib4nhh0OaRAV+Yts87kKdq0PP7pXfy6kDkUVs=
 github.com/stretchr/testify v1.7.2 h1:4jaiDzPyXQvSd7D0EjG45355tLlV3VOECpq10pLC+8s=
-golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
-golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=

slack.go

@@ -2,10 +2,10 @@ package main
 
 import (
 	"fmt"
+	"slices"
 
 	utils "github.com/jwilsson/go-bot-utils"
 	"github.com/slack-go/slack"
-	"golang.org/x/exp/slices"
 )
 
 type MessageInput struct {