Some typing fixes

b_asic/_preferences.py

@@ -2,10 +2,10 @@ LATENCY_COLOR = (0, 185, 231)
 EXECUTION_TIME_COLOR = (255, 100, 66, 200)
 SIGNAL_COLOR = (0, 0, 0)
 
-SIGNAL_LINEWIDTH = 1.0
+SIGNAL_LINEWIDTH: float = 1.0
 
-OPERATION_GAP = 0.5
+OPERATION_GAP: float = 0.5
 
-SCHEDULE_OFFSET = 0.2
+SCHEDULE_OFFSET: float = 0.2
 
-SPLINE_OFFSET = 0.2
+SPLINE_OFFSET: float = 0.2