make boot fix universal for 2 and 3

Luke Valenty · Luke Valenty · commit 9e539068c620 · 2018-05-15T00:30:02.000-07:00
diff --git a/programmer/tinyprog/__init__.py b/programmer/tinyprog/__init__.py
@@ -313,7 +313,7 @@ def program(self, addr, data):
 
 
     def boot(self):
-        self.ser.write("\x00")
+        self.ser.write(b"\x00")
         self.ser.flush()
 
 
