Migrated rpdata-api to using go modules and a more recent version of

gqlgen

Squashed commit of the following:

commit 162ccf6bfb
Author: Gisle Aune <dev@gisle.me>
Date:   Fri May 17 11:51:23 2019 +0200

    The great module madness continus, now with pointers.

commit 7e3dc49635
Author: Gisle Aune <dev@gisle.me>
Date:   Thu May 16 15:57:08 2019 +0200

    Basic stuff, doesn't compile

models/changes/subscribe.go

@@ -12,13 +12,13 @@ var subList []*subscription
 
 type subscription struct {
 	Keys     map[string]bool
-	Channel  chan<- models.Change
+	Channel  chan<- *models.Change
 	WildCard bool
 }
 
 // Subscribe subscribes to all changes.
-func Subscribe(ctx context.Context, keys []models.ChangeKey, wildcard bool) <-chan models.Change {
-	channel := make(chan models.Change, 64)
+func Subscribe(ctx context.Context, keys []models.ChangeKey, wildcard bool) <-chan *models.Change {
+	channel := make(chan *models.Change, 64)
 	sub := &subscription{
 		Keys:     make(map[string]bool, len(keys)),
 		Channel:  channel,
@@ -58,16 +58,18 @@ func pushToSubscribers(change models.Change) {
 	subMutex.Lock()
 SubLoop:
 	for _, sub := range subList {
+		changeCopy := change
+
 		if sub.WildCard && change.Listed {
 			select {
-			case sub.Channel <- change:
+			case sub.Channel <- &changeCopy:
 			default:
 			}
 		} else {
 			for _, key := range keys {
 				if sub.Keys[key] {
 					select {
-					case sub.Channel <- change:
+					case sub.Channel <- &changeCopy:
 					default:
 					}