[pyseabreeze] increase timeout in first get_serial_number call

Test if increasing the timeout for the first read after a spectrometer
is opened helps with getting the HDX to work reliably under Linux.

See #133.

src/seabreeze/pyseabreeze/devices.py

@@ -382,7 +382,7 @@ def get_serial_number(self):
                 return self.f.eeprom.eeprom_read_slot(0)
 
             elif isinstance(protocol, OBPProtocol):
-                serial_len = ord(protocol.query(0x00000101))
+                serial_len = ord(protocol.query(0x00000101, timeout_ms=10_000))
                 return protocol.query(0x00000100)[:serial_len].decode("utf8")
 
             else: