Upgrade versions of vendored libs

vendor/github.com/rogpeppe/go-internal/fmtsort/mapelem.go

@@ -1,6 +1,3 @@
-//go:build go1.12
-// +build go1.12
-
 package fmtsort
 
 import "reflect"

vendor/github.com/rogpeppe/go-internal/fmtsort/mapelem_1.11.go

@@ -1,24 +0,0 @@
-//go:build !go1.12
-// +build !go1.12
-
-package fmtsort
-
-import "reflect"
-
-const brokenNaNs = true
-
-func mapElems(mapValue reflect.Value) ([]reflect.Value, []reflect.Value) {
-	key := mapValue.MapKeys()
-	value := make([]reflect.Value, 0, len(key))
-	for _, k := range key {
-		v := mapValue.MapIndex(k)
-		if !v.IsValid() {
-			// Note: we can't retrieve the value, probably because
-			// the key is NaN, so just do the best we can and
-			// add a zero value of the correct type in that case.
-			v = reflect.Zero(mapValue.Type().Elem())
-		}
-		value = append(value, v)
-	}
-	return key, value
-}

vendor/github.com/rogpeppe/go-internal/fmtsort/sort.go

@@ -36,19 +36,18 @@ func (o *SortedMap) Swap(i, j int) {
 //
 // The ordering rules are more general than with Go's < operator:
 //
-//  - when applicable, nil compares low
-//  - ints, floats, and strings order by <
-//  - NaN compares less than non-NaN floats
-//  - bool compares false before true
-//  - complex compares real, then imag
-//  - pointers compare by machine address
-//  - channel values compare by machine address
-//  - structs compare each field in turn
-//  - arrays compare each element in turn.
-//    Otherwise identical arrays compare by length.
-//  - interface values compare first by reflect.Type describing the concrete type
-//    and then by concrete value as described in the previous rules.
-//
+//   - when applicable, nil compares low
+//   - ints, floats, and strings order by <
+//   - NaN compares less than non-NaN floats
+//   - bool compares false before true
+//   - complex compares real, then imag
+//   - pointers compare by machine address
+//   - channel values compare by machine address
+//   - structs compare each field in turn
+//   - arrays compare each element in turn.
+//     Otherwise identical arrays compare by length.
+//   - interface values compare first by reflect.Type describing the concrete type
+//     and then by concrete value as described in the previous rules.
 func Sort(mapValue reflect.Value) *SortedMap {
 	if mapValue.Type().Kind() != reflect.Map {
 		return nil