move gotd fork into repo. (#111)

- update to latest telegram layer
- remove some references to fields in tg.Entities that don't exist in
the schema
- originally added here:
https://github.com/beeper/td/commit/820929062a2ba0104397bc01235ab58a9cff780e
  - referenced here
-
https://github.com/mautrix/telegramgo/commit/124f0967ed195b5a380c9bd02e170ada9710dde3
-
https://github.com/mautrix/telegramgo/commit/4205047aab2e0639217148b5d125bfaab668bd8e

pkg/gotd/telegram/transfer_test.go

@@ -0,0 +1,40 @@
+package telegram
+
+import (
+	"bytes"
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tg"
+	"go.mau.fi/mautrix-telegram/pkg/gotd/tgmock"
+)
+
+func TestTransfer(t *testing.T) {
+	ctx := context.Background()
+
+	dc := 1
+	mockClient(func(a *tgmock.Mock, client *Client) {
+		user := &tg.User{ID: 10, Username: "abc10"}
+		auth := &tg.AuthAuthorization{
+			User: user,
+		}
+		exported := bytes.Repeat([]byte{10}, 10)
+		a.ExpectCall(&tg.AuthExportAuthorizationRequest{
+			DCID: dc,
+		}).ThenResult(&tg.AuthExportedAuthorization{
+			ID:    user.ID,
+			Bytes: exported,
+		}).ExpectCall(&tg.AuthImportAuthorizationRequest{
+			ID:    user.ID,
+			Bytes: exported,
+		}).ThenResult(&tg.AuthAuthorization{
+			User: user,
+		})
+
+		r, err := client.transfer(ctx, tg.NewClient(client), dc)
+		require.NoError(t, err)
+		require.Equal(t, auth, r)
+	})(t)
+}