* In `go.mod`, `go 1.21` * Drop dependency on `golang.org/x/exp/constraints` and use [`cmp.Ordered`](https://pkg.go.dev/cmp#Ordered) * Drop dependency on `golang.org/x/exp/slices` * Rewrite `Sort` to just wrap [`slices.Sort`](https://pkg.go.dev/slices#Sort) * Rewrite `Equals` to use [`maps.Equals`](https://pkg.go.dev/maps#Equals) * Rewrite `RemoveCommon` to use [`maps.DeleteFunc`](https://pkg.go.dev/maps#DeleteFunc) * Rewrite `Clear` using the `clear` built-in