Implement PEP561 typing support (#55)

MANIFEST.in

@@ -1,2 +1,3 @@
 include LICENSE
 include requirements.txt
+include aioesphomeapi/py.typed

aioesphomeapi/client.py

@@ -114,7 +114,7 @@ class APIClient:
         eventloop: asyncio.AbstractEventLoop,
         address: str,
         port: int,
-        password: str,
+        password: Optional[str],
         *,
         client_info: str = "aioesphomeapi",
         keepalive: float = 15.0,

aioesphomeapi/model.py

@@ -423,7 +423,7 @@ class NumberState(EntityState):
     missing_state: bool = False
 
 
-COMPONENT_TYPE_TO_INFO = {
+COMPONENT_TYPE_TO_INFO: Dict[str, Type[EntityInfo]] = {
     "binary_sensor": BinarySensorInfo,
     "cover": CoverInfo,
     "fan": FanInfo,