Merge pull request #18 from freekzy/fix-lack-of-write_eof-method

fix lack of write_eof method

mtprotoproxy.py

@@ -150,6 +150,9 @@ class LayeredStreamWriterBase:
     def write(self, data):
         return self.upstream.write(data)
 
+    def write_eof(self):
+        return self.upstream.write_eof()
+
     async def drain(self):
         return await self.upstream.drain()