Updates for go.mod

Signed-off-by: Alex Ellis (OpenFaaS Ltd) <alexellis2@gmail.com>

vendor/golang.org/x/tools/internal/versions/features.go

@@ -0,0 +1,43 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package versions
+
+// This file contains predicates for working with file versions to
+// decide when a tool should consider a language feature enabled.
+
+// GoVersions that features in x/tools can be gated to.
+const (
+	Go1_18 = "go1.18"
+	Go1_19 = "go1.19"
+	Go1_20 = "go1.20"
+	Go1_21 = "go1.21"
+	Go1_22 = "go1.22"
+)
+
+// Future is an invalid unknown Go version sometime in the future.
+// Do not use directly with Compare.
+const Future = ""
+
+// AtLeast reports whether the file version v comes after a Go release.
+//
+// Use this predicate to enable a behavior once a certain Go release
+// has happened (and stays enabled in the future).
+func AtLeast(v, release string) bool {
+	if v == Future {
+		return true // an unknown future version is always after y.
+	}
+	return Compare(Lang(v), Lang(release)) >= 0
+}
+
+// Before reports whether the file version v is strictly before a Go release.
+//
+// Use this predicate to disable a behavior once a certain Go release
+// has happened (and stays enabled in the future).
+func Before(v, release string) bool {
+	if v == Future {
+		return false // an unknown future version happens after y.
+	}
+	return Compare(Lang(v), Lang(release)) < 0
+}