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/peers/storage_test.go

@@ -0,0 +1,45 @@
+package peers
+
+import (
+	"context"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestNoopCache(t *testing.T) {
+	a := require.New(t)
+	ctx := context.Background()
+	c := NoopCache{}
+
+	_, ok, err := c.FindUser(ctx, 1)
+	a.NoError(err)
+	a.False(ok)
+
+	_, ok, err = c.FindUserFull(ctx, 1)
+	a.NoError(err)
+	a.False(ok)
+
+	_, ok, err = c.FindChat(ctx, 1)
+	a.NoError(err)
+	a.False(ok)
+
+	_, ok, err = c.FindChatFull(ctx, 1)
+	a.NoError(err)
+	a.False(ok)
+
+	_, ok, err = c.FindChannel(ctx, 1)
+	a.NoError(err)
+	a.False(ok)
+
+	_, ok, err = c.FindChannelFull(ctx, 1)
+	a.NoError(err)
+	a.False(ok)
+
+	a.NoError(c.SaveUsers(ctx, nil))
+	a.NoError(c.SaveUserFulls(ctx, nil))
+	a.NoError(c.SaveChats(ctx, nil))
+	a.NoError(c.SaveChatFulls(ctx, nil))
+	a.NoError(c.SaveChannels(ctx, nil))
+	a.NoError(c.SaveChannelFulls(ctx, nil))
+}