Handle get_history flood waits

It's likely to get triggered when using iter_history (every ~3k msgs)

pyrogram/client/methods/messages/get_history.py

@@ -16,12 +16,17 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with Pyrogram.  If not, see <http://www.gnu.org/licenses/>.
 
+import logging
+import time
 from typing import Union
 
 import pyrogram
 from pyrogram.api import functions
+from pyrogram.api.errors import FloodWait
 from ...ext import BaseClient
 
+log = logging.getLogger(__name__)
+
 
 class GetHistory(BaseClient):
     def get_history(self,
@@ -66,6 +71,8 @@ class GetHistory(BaseClient):
             :class:`Error <pyrogram.Error>` in case of a Telegram RPC error.
         """
 
+        while True:
+            try:
                 messages = pyrogram.Messages._parse(
                     self,
                     self.send(
@@ -81,6 +88,11 @@ class GetHistory(BaseClient):
                         )
                     )
                 )
+            except FloodWait as e:
+                log.warning("Sleeping for {}s".format(e.x))
+                time.sleep(e.x)
+            else:
+                break
 
         if reverse:
             messages.messages.reverse()