Update event.py

Increase CPython compatibility by using a boolean value for the state.
Compatibility also achieveable by only changing is_set() to "return self.state==1" so it returns a boolean.  self.state should never be accessed directly from the outside so could stay an integer.

uasyncio_iostream/uasyncio/event.py

@@ -4,16 +4,16 @@ import uasyncio
 class Event(uasyncio.Primitive):
     def __init__(self):
         super().__init__()
-        self.state = 0 # 0=unset; 1=set
+        self.state = False
     def set(self):        # Event becomes set, schedule any tasks waiting on it
         self.run_all()
-        self.state = 1
+        self.state = True
     def clear(self):
-        self.state = 0
+        self.state = False
     def is_set(self):
         return self.state  # CPython compatibility
     async def wait(self):
-        if self.state == 0:
+        if not self.state:
             # Event not set, put the calling task on the event's waiting queue
             self.save_current()
             yield