Update go.mod and vendor

vendor/github.com/hashicorp/go-immutable-radix/edges.go

@@ -1,21 +0,0 @@
-package iradix
-
-import "sort"
-
-type edges []edge
-
-func (e edges) Len() int {
-	return len(e)
-}
-
-func (e edges) Less(i, j int) bool {
-	return e[i].label < e[j].label
-}
-
-func (e edges) Swap(i, j int) {
-	e[i], e[j] = e[j], e[i]
-}
-
-func (e edges) Sort() {
-	sort.Sort(e)
-}