Add small fix to typing in signal

b_asic/signal.py

@@ -16,8 +16,8 @@ class Signal(AbstractGraphComponent):
     _source: "OutputPort"
     _destination: "InputPort"
 
-    def __init__(self, source: Optional["InputPort"] = None, \
-                destination: Optional["OutputPort"] = None, name: Name = ""):
+    def __init__(self, source: Optional["OutputPort"] = None, \
+                destination: Optional["InputPort"] = None, name: Name = ""):
 
         super().__init__(name)